Australian singer, Ricki-Lee Coulter, on her 2005 single, Sunshine from her debut studio album, Ricki-Lee, which was released in October of that year. She also worked with Christina Aguilera on her album Back to Basics in 2006, co-writing twelve of the thirteen tracks on disc one of the album, among them being "Ain't No Other Man", and "Back in the Day". In the same year, she collaborated with Jesse McCartney on his album Right Where You Want Me, co-writing four songs called "Anybody", "Invincible", "Running Away" and "Feels Like Sunday". In 2007, DioGuardi worked with many notable artists, one of whom was Britney Spears. DioGuardi wrote and produced "Ooh Ooh Baby" and co-produced "Heaven on Earth" on Spears' album Blackout. DioGuardi also contributed a majority of songs on Hilary Duff's fourth studio album, Dignity. Since American Idol Season 8, DioGuardi returned to songwriting and producing, and has worked with number of artists, including Pink's "Sober," Kelly Clarkson's "I Do Not Hook Up," Cobra Starship's "Good Girls Go Bad," Katharine McPhee's "Had It All", Carrie Underwood's "Undo It", and Theory of a Deadman's "Not Meant to Be" among other new releases. Among DioGuardi's projects is the song "Not Meant to Be", which appears on Theory of a Deadman's 2008 album, Scars & Souvenirs. DioGuardi co-wrote the song with lead singer Tyler Connolly, and is also featured as the love interest in the music video which was released on March 10, 2009. This was her debut in the music video industry. In 2007, Dioguardi and Eurythmics member Dave Stewart wrote "Taking Chances" for Celine Dion. It was released as the first single from the album Taking Chances in September 2007. The song was a success around the world, peaking inside the top ten in Belgium, Canada, Denmark, France, Italy and Switzerland. It also peaked at number 40 on the UK Singles Chart, while on the Billboard Hot 100 chart, it reached number 54. In 2009, DioGuardi wrote "If I Can't Have You" for Meat Loaf's 2010 album, Hang Cool Teddy Bear and recorded the vocal as a duet with Meat Loaf. She is also one of the writers for "Ghost", which was released as a single from Fefe Dobson's album Joy (2010). She wrote songs for Aussie singer Natalie Imbruglia's third studio album Counting Down the Days. After taking a break from writing she wrote on Kelly Clarkson's "Heartbeat Song" which was