RihannaAt this time last year, singer Rihanna had planned on performing at the Grammys but that changed when she was assaulted by ex-boyfriend Chris Brown on the eve of the show. Rihanna will be sitting on the sidelines for this year's award show, and the singer sited the altercation as the reason why she's not taking the stage. "We messed their show up pretty bad last year," she said in a radio interview with Carson Daily. "They might be a little mad at me."

Brown turned himself into authorities for attacking Rihanna on the same day as the Grammys. As a result producers scrambled to change the performance line-up as Brown was also scheduled to perform. The then couple kept mum on the situation, but pictures of a bruised and battered Rihanna soon hit the Net, solidifying the assault. For months the two became the focus of media fodder as Brown was charged with felony assault. He reached a plea deal with prosecutors to avoid jail time but was slapped with five years probation, 180-days of community labor and ordered to attend a domestic violence course. He is also not allowed to have contact with Rihanna.

Months after the altercation, Rihanna broke her silence appearing on the ABC news magazine '20/20,' in which she vividly detailed the assault. "He had no soul in his eyes, just blank. He was clearly blacked out." she said of the incident. Despite their split Rihanna also stated that she wanted to see Brown do "well" in his career a task that has proved daunting upon dropping his third album 'Graffiti.' The album debuted at No. 7 on the Billboard Top 200 charts.

Rihanna has since moved on, and is dating Los Angeles Dodgers baseball player Matt Kemp. She said that she will attend music's biggest night. The 52nd Annual Grammy Awards air live on CBS, Jan 31 at 8 PM EST.