Avril Lavigne celebrates the Magic Convention with an official Abbey Dawn after party at Pure nightclub inside Caesar’s Palace on Tuesday (August 23) in Las Vegas.

The 26-year-old Canadian rocker tweeted, “The @AbbeyDawn booth @ Magic is awesome! Thanks to everyone who stopped by. Day 2. See you soon! xoxo.”

PHOTOS: Check out the latest pics of Avril Lavigne

Avril has been busy lately – she recently attended Kim Kardashian’s wedding with her boyfriend, Brody Jenner, and is gearing up to show her collection during New York Fashion Week!

10+ pictures inside of Avril Lavigne at an Abbey Dawn after party in Las Vegas…

Rihanna checks out the nightlife scene with her girlfriends on a night out in Portofino, Italy on Wednesday (August 24).

The 23-year-old singer wore a floor-length gown and also made time to sign an autograph for a fan before she and her gal pals hopped onto a boat.

PHOTOS: Check out the latest pics of Rihanna

Earlier in the day, Ri ate an ice cream cone for dessert after going out for lunch with a friend at Chuflay Bar Restaurant. Yum!

10+ pictures inside of Rihanna out and about with her friends…

Taylor Lautner grabs a bite to eat with an Oscar-nominated duo at Italian eatery Bottega Louie in downtown Los Angeles on Wednesday (July 13).

The 19-year-old Abduction action star dined with 2008’s Milk director Gus Van Sant and Milk screenwriter Dustin Lance Black, who won an Academy Award for Best Original Screenplay in 2009. Looks like these three have an exciting film project in the works!

Abduction, which co-stars rising actress Lily Collins, is due out in theaters on September 23.

Taylor recently starred in a new Funny or Die sketch, “Field of Dreams 2: NFL Lockout”!

10+ pictures inside of Taylor Lautner’s downtown dinner…

Rosie Huntington-Whiteley is white hot in Dolce&Gabbana at a press conference for Transformers: Dark of the Moon on Thursday (July 14) at the Waldorf Astoria in Shanghai, China.

The 24-year-old British model and actress was joined by co-star Shia LaBeouf and the action flick’s director, Michael Bay.

Rosie, who recently said that she’d love to make more movies, told the German edition of OK! that “acting feels so natural.”

“I am so grateful that I got this opportunity and hopefully it’s not my last movie. Of course I would miss modeling but maybe I could do a cover shoot being an actress then!” she shared.

In case you missed it, check out Rosie nearly nude ad for Burberry Body!

FYI: Rosie finished off her look with Christian Louboutin heels.

Sara Bareilles is joining the judges’ table on the NBC talent competition The Sing-Off!

The 31-year-old singer and songwriter, along with fellow judges Ben Folds and Boyz II Men’s Shawn Stockman, will try to find the best a capella group when the show’s third season, hosted by Nick Lachey, kicks off Monday, Sept. 19, at 8 p.m.

“A cappella music is very near and dear to my heart, and I have been a huge fan of the show from the beginning,” Sara said. “I love the opportunity to be a part of something that celebrates a genre of music that I just adore and believe in. I can’t wait for it to start.”

“Sara will bring a sublime technical knowledge and huge appreciation for The Sing-Off,” Paul Telegdy, NBC’s executive VP of alternative programming, added.

WILL YOU WATCH Sara, Ben, and Shawn on The Sing-Off?