BILLBOARD

Donald Trump has announced the official line-up for the 5th season of Celebrity Apprentice, his biggest cast yet. If you're a reality-TV junkie, a lot of the contestants are familiar faces. But for a lot of people, skimming down the large list has them asking who? Here's the run-down of who's taking on the Trump challenge and why they're famous.

I can't stop looking at it!! declared the pop princess.

Rolling Stone's latest cover boys have a whole lot to say about rock and roll and that Canadian band.

A former executive of Marc Jacobs has resolved a lawsuit that earlier charged company's president Robert Duffy of creating a sexually discriminative environment at workplace.

Twilight actress Ashley Greene is the new face of DKNY.

U2 is No. 1 when it comes to touring. The band had the highest-grossing tour both in North America and worldwide in 2011.

Michael Buble continued his Christmas reign at the top of the Billboard 200 album chart on Wednesday for the fifth consecutive week, keeping Adele and rapper Young Jeezy from the No. 1 position.

Among musicians, flat is a word you don't want to hear. But to the industry, flat is truly music to everyone's ears.

2011's year in pop was led by Perry and her number one singles.

Justin Bieber seems to have caught the Christmas spirit of giving this year as he gave his best friend Ryan Butler a convertible Mustang on Sunday.

Twilight actress Ashley Greene, halted traffic in Times Square on Thursday as she unveiled a DKNY Jeans billboard that she stared in.

Singer Michael Buble is taking his Christmas spirit into the virtual realm, collaborating with popular Facebook game CityVille and giving an interactive gift to his fans over the holidays.

Melanie Amaro has wonThe X Factor, but not much is known about the singer who was eliminated by mentor Simon Cowell before being brought back for the win. What will she do with the $5 million prize? What's her plan for her debut album? How do finalists Josh Krajick and Chris Rene feel about the results? Find out this and more here.

The Hunger Games opens in theaters in March.

Rihanna released the video for her latest single, You Da One, on Friday via Vevo.

Rihanna's single We Found Love on Thursday held the top spot on the Billboard Hot 100 singles chart for the eighth straight week, making it the singer's longest-running No. 1 single of her career.

Iconic California surf band The Beach Boys will reunite in 2012 to release a new album and embark on a 50-date worldwide tour celebrating their 50th anniversary, the band said on Friday.

he Beach Boys are back in town to celebrate their 50-year anniversary with a brand new album and tour, which will kick off at the 2012 New Orleans Jazz Fest, the band announced on their Website.

Shirtless men clad in red sweatpants have been lining up for days in Singapore's prime shopping district, part of an advertising gimmick revealing not just muscle but also a gradual unpeeling of the city state's puritanical ways.

Bieber beat out Kim Kardashian, Lady Gaga and Casey Anthony.

The year 2011 is coming to a close and the flurry of retrospectives has begun. The latest to offer a look back is Billboard with its list at the of the Top 20 singles of 2011.