Billboard Bits: Britney Spears, Mariah Carey, Jane's Addiction and more

Britney Spears at the 2008 MTV Video Music Awards.

Billboard Bits serves up the best bite-sized nuggets of music news and gossip each day.

A leaked demo version of Lady Gaga and Beyonce's hit song "Telephone" hit the internet this weekend, with Britney Spears doing the vocals. Although she never completed the track, Gaga had written the song for Spears to use on her "Circus" album, but Britney passed.


Jane's Addiction will make its first public appearance with former Guns N' Roses' bassist Duff McKagen at an intimate Bardot in Hollywood on Wednesday. The Cinco de Mayo celebration in Los Angeles will be free, but only the first 100 fans to show up will fit inside.

Mariah Carey is the first the first superstar musician to get an iced-up iPad. Carey and Jermaine Dupri were filmed playing around in the recording studio with the custom rhinestone encrusted iPad that was given to her as a gift from cosmetics company Elizabeth Arden.

"American Idol" judge Randy Jackson has launched his own record label and plans to get back to producing artists. His first signing, according to Perez Hilton, was with an old friend - "Idol" Season Two finalist, Kimberley Locke.