Rihanna took her little brother Rajad to The Grove in West Hollywood for some afternoon shopping, and the pop star proved what a generous big sister she is!

While making their way through the crowds of screaming fans, RiRi held on tight to her bro's shoulders.

Rajad, wearing a diamond T-Shirt and holding on to his Nordstrom bag, looks as though he's enjoying all the attention. We would, too!

It's good to be RiRi's sibling.

Scarlett Johansson is showing off her sexy and sultry voice in the remake of Serge Gainsbourg's classic song "Bonnie & Clyde."

Although the video looks like a commercial for Moet & Chandon champagne, ScarJo still manages to look incredibly gorgeous while singing along with Gainsbourg's son, Lulu. The duo have teamed up for a tribute album called Gainsbourg To Lulu.

The original song, released in 1968, was sung by the equally gorgeous Brigitte Bardot. Click thru to hear the original version.

Salma Hayek and 4-year-old daughter Valentina were all smiles at The Venice Film Festival on Sunday.

Of course, that may because the two got plenty of helping hands as they descended into a boat, where Salma's hubby (and Valentina's pops) Francois-Henri Pinault awaited.

The family seemed particularly carefree given that Pinault is currently engaged in a legal battle with ex Linda Evangelista. But, they did get some joy from celebrating Salma's 45th birthday, which was Friday!

Check out a pic of Salma and Francois after the jump!

Yowza! Actress Gabrielle Union looked smokin' in a black bikini over the weekend!

Union, 37, relaxed on the Miami beach with her younger boyfriend, 29-year-old Miami Heat star Dwyane Wade. But, she had no problem holding her own next to his rock-solid bod.

The couple, who have been dating for about a year-and-a-half, played in the water with Wade's kids. Too cute!

Kelly Osbourne showed how much she loves hot pink and orange at Katsuya this weekend, where she dined with the Beacher's Madhouse show creator Jeff Beacher.

The Fashion Police host paired her look with some socks, heels, a leather jacket and a leopard-print bag.

Wonder what Joan Rivers would have to say about this ...

Matt Damon, 40, looked shorn and sexy at the Venice Film Festival on Sunday, where the actor was promoting his new flick Contagion.

The movie, about a deadly disease outbreak, brings together old friends for the actor. Steven Soderbergh is directing, and the two have worked together many times (including on all the Ocean's 11 films.) Gwyneth Paltrow co-stars. Of course, Paltrow is the ex of Damon's best bud, Ben Affleck, and in this flick she plays Matt's wife! Wonder if that's at all awkward ...

Then again, she's also Brad Pitt's ex-fiance, and Matt starred with him in the Ocean's movies, which, again, Soderbergh directed. Ah, the sometimes-too-small world of Hollywood!

Let's hope the Season 13 cast for Dancing With The Stars were prepared for all the hard work they signed up for!

Rob Kardashian and dancing pro Cheryl Burke left the rehearsal studio looking totally wiped out. Watch out, Rob ... Ms. Burke doesn't mess around, but her incredible work on the dance floor proves she's in it to win it. Let's hope Cheryl can convince Kim's younger brother to go shirtless for one of the numbers.

Chaz Bono and his partner Lacey Schwimmer also got their dancing groove on in the studio ... in preparation for the show's premiere on September 19.

See all of the couples leaving a hard day of practice in the gallery below.

Hollywood preggos like Tori Spelling and Nia Long can't live without their maxi dresses!

Spelling, who is expecting her third child with hubby Dean McDermott, went for a white printed version while hanging with her family at the Malibu Chili Cook-Off.

Long, who is expecting her second child, rocked a red striped maxi and a big smile. We'll admit ... Nia's dress gets our vote!

Both stylish ladies are due within the next few months. The countdown is on!