Los Angeles, CA, United States (Celebrity News Service) - Demi Lovato is back. The singer/actress is getting ready to premiere her first song and music video following a tumultuous year which saw her in rehab for a string of personal issues.

Los Angeles, CA, United States (Celebrity News Service) - Rihanna is currently on her hottest tour yet, but things got so hot at her recent "Loud" tour stop the show had to be cut short and the audience was forced to proceed to the exits.

Los Angeles, CA, United States (Celebrity News Service) - Ke$ha covered an Alice Cooper song during a recent show in Oslo, Norway, and the "Tik Tok" singer was joined by a special guest for the song.

Los Angeles, CA, United States (Celebrity News Service) - Charlie Sheen has made his rap video debut with the Chain Swangaz in their video for "Steak & Mash Potatoes."

Los Angeles, CA, United States (Celebrity News Service) - There are even more pop music fans feeling the disappointment this summer. Katy Perry is the latest star forced to cancel tour dates due to illness.

Los Angeles, CA, United States (Celebrity News Service) - LMFAO earn their first-ever #1 on the Billboard Hot 100 chart this week with their international smash "Party Rock Anthem." Featuring Lauren Bennett and GoonRock (also earning first-ever frames at #1), the song jumps from #3 to #1, selling 258,000 copies. It's also #1 on the digital sales chart.

London, England, United Kingdom (Celebrity News Service) - Latin pop star Ricky Martin says he hopes to add a little girl to his brood.

London, England, United Kingdom (Celebrity News Service) - Gwyneth Paltrow says she would rather "smoke crack" than eat unhealthy food.

Charlotte, NC, United States (Celebrity News Service) - While Taylor Swift is currently on her sold-out Speak Now World Tour, the country queen is battling a bout with bronchitis. She's being forced to cancel shows.

Los Angeles, CA, United States (Celebrity News Service) - Beyonce earns her fourth solo #1 album with "4," her fourth studio album, which debuts at the top of the Billboard albums chart this week. The album sells 310,000 copies, her lowest opening week tally since 2003's "Dangerously In Love" opened with 317,000.

Los Angeles, CA, United States (Celebrity News Service) - Sometimes, it's good to just come in ninth place. Pia Toscano, who was shockingly eliminated early on during this year's 10th season of "American Idol," has officially earned a record deal with Interscope Records.

Los Angeles, CA, United States (Celebrity News Service) - While most others fired up the grill and watched fireworks, Madonna spent her 4th of July hitting the recording studio for the first time to work on her 12th studio album.