TMZ — Filed under: Chris Brown, Rihanna, Raz B, Celebrity Feuds Chris Brown 's Twitter feud with former  B2K singer Raz B took a violent turn last night -- when Raz's brother threatened to put a "mother f**king ... more info

Pop Bytes — Normally, I love Twitter fights, mostly because it's like seeing two people at their basest level trying to rip each other's throats out using misspelled words. Except yesterday when Chris Brown got into a feud with Raz B from B2K (... Who?) and the... more info

ContactMusic — CHRIS BROWN has become embroiled in a vicious online feud with R&B singer RAZ-B after the former B2K star made a remark about his ex-girlfriend RIHANNA.Brown, who split from the Umbrella beauty in 2009 after a violent bust-up, became incensed when Ra... more info

Topix — Chris Brown shouldn't have let Raz-B take him there. R&B star Chris Brown spent much of Wednesday undoing recent gains to his reputation by lashing out with gay and racist slurs online at another artist who'd insulted him with a comment about Rihanna... more info

Guardian Music — Your percentage by percentage guide to the year in pop15% At the disco!"So we back in da club" Usher DJ Got Us Fallin' In Love"I'm in the club so I'm gonna do, do, do, do . . ." Taio Cruz Dynamite"Messin' with the baddest chicks in the club" Black Ey... more info

The Newsroom — The latest celebrity news including Reese Witherspoon gets engaged, Rihanna is single and Bob Jovi still rocks. more info

TMZ — Filed under: Chris Brown, Raz B, Celebrity Feuds, Music So much for anger management ... Chris Brown just unloaded an offensive, scathing Twitter attack on a former member of the R&B group B2K ... and it had... more info

People.com — Amid rumors of a breakup with Matt Kemp, a source tells PEOPLE the singer considers herself on the market more info

Mjsbigblog — Dance jams filled the Hot 100 during 2010, and DJ Earworm takes the Top 25 songs from the year end Billboard Hot 100 chart to make a glorious mash-up of your favorite auto-tuned, beat- filled pop songs. Are your favorite songs samp... more info

Yahoo! Music UK — world entertainment news - Rihanna has sparked rumours she is lining up a role on Simon Cowell's latest TV talent show after she enjoyed dinner with the music mogul in Barbados. more info