Making the most of every free moment!

Katy Perry and some of her backup dancers capitalized on their downtime from her Prismatic tour in Missouri on Monday by hitting the local waterpark for some fun in the sun, and the singer showed off her enviable bikini body in an Instagram video posted for fans!

"Hi from the [fish emoticon] on #theprismaticworldtour," she captioned the vid, which shows the whole group dunking underwater while giving the peace sign. We bet it would a blast to work with the pop princess! The songstress is performing a show at Kansas City's Sprint Center tonight, and will head to Nebraska on Wednesday for another performance.

She is hot and seems super fun, so we think John Mayer made a huge mistake letting her go!

Before every member of the Rihanna Navy starts sending us hate mail and nasty tweets, we'd like to point out that all of us here at X17online absolutely adore Bad Gal RiRi, and not only would we love to raid her closet, but we would seriously DIE if we ran into her. (And we've met a ton of stars, but so far she's not one of them.)

That said, we have to call her out for the hair do don't she rocked in New York City last night when X17 photographers snapped her picture. Ri's makeup was flawless, but her long and clumpy locks look like they belong on a neglected Barbie doll. I mean, she's worth an estimated $48 million -- you'd think the 26-year-old R&B superstar could afford some better fake hair!

On Monday night Kim Kardashian posted the photo of herself and hubby Kanye West above and wrote, "#MexicoNightsWithMySexyMan," and it looks like the couple are having a blast at pal Joe Francis' pad south of the border.

Judging from the smiles on their faces, it seems like they're still on their honeymoon -- which is amazing when you think about the fact that Kim's third marriage has now lasted several weeks longer than her 72-day union to NBA star Kris Humphries. Nice work, you two!

Of course, Kim had to throw in a pic of her big ol' booty for good measure, and the reality starlet also posted a pic of herself on the water with a gal pal and added, "Not easy taking a selfie jet skiing." Hmm, maybe she should stick to the shots of her rear. I mean, aside from Nori's precious face, that's really the only thing Kim posts these days that's remotely interesting...

Tyler Perry nominated Ben Affleck to partake in the ALS ice bucket challenge, and on Monday the 42-year-old actor posted the video above, but thanks to his wife Jennifer Garner, there's a bit of a twist at the end of it!

"I guess I have to pick four other people so my people are going to be folks who I know from firsthand experience look good in a wet T-shirt," Affleck joked, while challenging Jimmy Kimmel, Neil Patrick Harris, Matt Damon and Garner, or as he put it, "the lady with the bucket." (And yes, we're pleased to see that there's ice in the bucket AND that Ben actually pledged to donate money to the ALS Association.)

After Jen dumped the water on her hubby's head, he quickly grabbed her, and both of them ended up getting soaked. How you ask? Watch the video and see for yourself!

Is this for the show or is this for real?! Either way, it sounds like there's all sorts of drama in the Kardashian-Disick household!

On Monday afternoon Kourtney Kardashian checked in to the Montage hotel in Beverly Hills, and not only did the pregnant reality TV starlet have a ton of luggage with her, but she was joined by her son Mason. Her longtime boyfriend Scott Disick returned from the east coast last night with Khloe, and over the last few weeks, the duo have been spending less and less time together. And when you consider the fact that Kourtney, 35, is set to give birth to the couple's third child later this fall, this could be all kinds of bad!

Scott hosted a party at Foxwoods Resort and Casino in Connecticut on Sunday, and while it was a paid appearance, apparently his partying and obsession with the social scenes in Hollywood and New York has put a serious strain on his relationship with Kourtney.

Back in July Kourtney jetted home from the Hamptons after a fight with Scott, and at the time a source told Us Weekly, "Kourtney was yelling at Scott after she found an inappropriate picture of him with another girl." Apparently Kourt started screaming, "You need to be a more responsible father and get better. There is another baby on the way! You need to straighten up or get out!" She then kicked Scott out of the house, at which point he checked in to a nearby hotel for the night.

But why is SHE the one checking in to a hotel this time!? And why didn't she crash at mom Kris Jenner's compound? So many questions!

This just made us so uncomfortable!

Taylor Swift just dropped her new song "Shake It Off" and a corresponding music video today during her Yahoo! Live stream, and let's hope she's ready for some ridicule, because her dancing is downright embarrassing!

The singer told the audience that the track is about "the idea that people can say whatever they want about us at any time, and we cannot control that." Maybe if she's doesn't want people talking badly about her, she should have thought about hiring a better choreographer?

T-Swizzle, we love you, but not this vid!

Looks like Shia LaBeouf and his lady love, Nyphomaniac co-star Mia Goth, need poquito mas of each other! The twosome, who have been dating since 2012, were holding hands as they left Mexican eatery Poquito Mas on Monday afternoon. They're getting their week started off right -- with tacos and each other!

Despite the fact that the duo have been together since late 2012, it's not often that we spot them out and about. The actors met on the set of Lars Von Trier's Nymphomaniac, and there were reports that they had un-simulated sex during filming. That could explain how they connected so well!

On June 26 the 28-year-old star was arrested during a performance of Cabaret at Studio 54 after he yelled and allegedly struck fellow patrons at the theater. When cops tried to calm him down, he reportedly screamed, “I’ll f*ck you up!" Shia had reportedly downed four strawberry margaritas at New York’s Iguana Club prior to the incident, and days afterwards his rep confirmed that he had started seeking treatment for alcohol abuse.

For the past few months, Shia has been spotted seeking treatment and has seemed very calm in the midst of the media storm that has followed him. Maybe Mia is a good influence on him?

Putting the hot in hot yoga -- get it, girl!

Kaley Cuoco went to yoga class on Monday afternoon, and the 28-year-old starlet showed off her fit physique in a sheer white tank and short shorts. And the gym isn't the only place she busts her butt -- we still can't believe that she's raking in a whopping $1 million an episode for her role on The Big Bang Theory.

Kaley's been on the show since 2007, and though her co-stars Jim Parsons and Johnny Galecki were also raised to the same rate, apparently two of the lesser-known actors on the show, Simon Helberg and Kunal Nayyar, are ready to quit! "[The pay bump] just doesn't sit well with anyone," a source tells Star mag. "It has created a major rift between them and costars Simon Helberg and Kunal Nayyar, who also feel they're an integral part of the show. [But] Kaley, Jim and Johnny believe they're the real stars of the show and deserve the money."