After Madonna played a mash-up of her 1989 hit single "Express Yourself" and Lady Gaga's "Born This Way" during a concert in Israel, Gaga decided to hit back ...

The pop star, 25, had a few choice words for her elder, 53, at an Auckland, New Zealand concert last week, according to The Huffington Post.

Gaga addressed the crowd, pointing to those who "make a mockery of " her work. Though she didn't name Madonna directly, she went on to say:

"That doesn't make me feel good at all. That just makes me feel like I'm not a good human being ... I don't even want to fight back because it's more important to me to keep writing music. Because that's really all I care about, is the music ... things are really different than they were 25 years ago, and that's what makes 'Born This Way' so relevant for me. We're socially in a different place and it's OK, we don't have to all slice and hate each other anymore."

You think Lady Gaga was justified in making her comments? Or was Madonna justified in her spoof?

Lindsay Lohan arrived on the Liz & Dick set today, and after crashing into an 18-wheeler on the PCH last Friday on her way to work, Lilo is keeping a low profile ... and keeping away from the steering wheel.

The 25-year-old starlet was snapped in the passenger seat of an Escalade on Monday, and sources on set tell X17online that she has "really beefed up her security team," adding on a round-the-clock driver and yet another bodyguard. Lilo's new muscle used a decoy car to throw off photographers on the way to work today, and after missing a day of shooting on Friday due to her accident, she arrived at her trailer early this morning and went on set at 12:30.

In another interesting twist, Liz & Dick executive producer Larry A. Thompson told Deadline the other day that Lohan was not supposed to get behind the wheel while going to work on Friday, or any day for that matter. Thompson noted that the production company provided a limousine to drive the actress to and from the set of the movie every day, but apparently she had other ideas. “When they went to pick her up [on Friday], for some reason she decided they [Lohan and her assistant] would get in her own car, so the limousine driver followed them," Thompson said.

Sigh. If only Lilo had followed orders, she might not be facing jail time for lying to authorities!

We get it, you're a grunge rocker!

Avril Lavigne showed off her new one-sided shaved haircut in France on Saturday, and the "Complicated" singer gave us her best scowl to match her edgy 'do! We know Brody Jenner's ex doesn't like being labeled a "pop" star, so we guess this is her way of proving that provocative outfits and pigtails a la Britney Spears isn't quite her cup of tea!

Speaking of X-Factor US judge Miss Spears, these two might have more in common than you think! Reports recently surfaced that the Canadian songstress is in talks to be a judge on X-Factor UK. Rita Ora, Alicia Keys, and Gwen Stefani are also being eyed for the gig.

No offense to this Sk8ter girl, but we have no doubt Gwenny would be a better pick!

Marie Claire

Blake Lively covers the new issue of Marie Claire, and the 24-year-old Savages starlet looks amazing in her shoot for the mag.

Blake may have been styled for this spread, but she says she doesn't have a personal stylist like so many other actresses do these days. Why not? "Because I love fashion," she says. "It’s such an expression of self. I often see people and they look great, but I can identify who styled them. Every stylist has a signature. Maybe it sounds jerky, but I’m lucky to be on such a fashion-centric show [Gossip Girl]. There’s no designer I don’t have access to.”

On the public’s perception of her, Blake tells the mag, "People like to draw parallels between my life and the scandalous stories on Gossip Girl. I dress the same as my character, so they think, She lives this life on and off set. I recently shared how many boyfriends I’ve had [four], and people were like, ‘That’s impossible!’ But it’s true. I’ve been with very few people. If I’m not with somebody who really excites or inspires me, then I’d rather be by myself." Well put!

We'll see Blake on the big screen in next month's Savages, and she reveals that she prepared for her role by practicing her firearms skills. "I went to the gun range and learned how to shoot a gun for the first time," she says. "It was awful. I asked myself, ‘Why were these things ever invented? But I did feel good that my first three shots were straight to the heart. It’s good to know – don’t mess with me in a gun battle." She can shoot AND dress to kill? Yet another reason why we love love love her!

The party doesn't stop for Gwen and the gang!

Yesterday, the 42-year-old singer and her sons Kingston and Zuma were spotted on their way to a birthday bash in Long Beach and looked adorable as they all held hands en route. How cute!

The No Doubt frontwoman was probably enjoying her downtime as she and her band are almost done completing their new album. “Last of the studio days I love this record gx,” Gwen tweeted along with a close-up of her in the studio. The new record is expected to hit stores September 25. Can't wait!

Another romance bites the dust.

After only dating for roughly three months, it appears as if Zac Efron and Lily Collins are going their separate ways, according to Us Weekly.

Sources told the publication that split was most likely due to their hectic schedules. "They're no longer together," one source said. "They were never serious, though; it was just a casual thing and it fizzled. They were never in the same place at the same time."

This development comes just hours after reports of Miley Cyrus' brother Trace Cyrus and fiance Brenda Song calling off their engagement. In addition, it's been reported that Denise Richards and Richie Sambora have ended their relationship as well. Looks as if these celebrity breakups come in threes!

Lindsay Lohan could be dealing with far bigger problems than repair bills and increased insurance rates after crashing her rented Porsche into a truck on the Pacific Coast Highway last week.

As we reported exclusively on Friday, Lohan was texting photographers and reporters telling them she wasn't behind the wheel at the time of the accident, and though she stuck with this story when she was questioned by Santa Monica police at the hospital, her assistant told cops that it was Lohan who was actually driving the car.

Now TMZ is reporting that the police documents make note of Lindsay lying about her involvement, so not only would she be breaking the law by providing an officer with false information, but this could be a probation violation in her shoplifting case, which means the possibility of jail time.

In addition to the different accounts in the police report, several eyewitnesses at the scene tell X17online they saw Lohan driving, and others noted that the actress and her assistant both got out of the passenger side of the car, which is a bit suspicious. Think this is why she speed-dialed attorney Shawn Chapman Holley as soon as the accident occurred?

Sometimes a girl's gotta spoil herself!

Over the weekend, cameras caught Minka Kelly is a cute purple maxi dress as she was coming out of famed hair salon Byron and Tracey in Beverly Hills and she obviously got the special treatment!

The 31-year-old actress is probably channeling the right 'do for her new role as it has been announced that she'll play the Jackie O in Lee Daniels' next film, The Butler, starring alongside Forest Whitaker, Oprah Winfrey, Nicole Kidman and more. With a great project on the horizon, no wonder Minka's looking more radiant!