Simon Cowell says Bobby Brown tops his list of rudest stars. The "American Idol" judge loves discussing arrogant celebrities with his friends, adding he has a top 10 list of famous people he dislikes.

He explained: "It's a great game, I always do this. Whenever we go out, I always say to people, whoever it is - drivers, stewardesses - I always ask, 'Who is the rudest person you've ever met?' We play it every time we go out to dinner and we've got a current top 10 and we always update every week. Bobby Brown has literally been number one for six years."

Rihanna's mentor has begged people to stop discussing the singer's private life. Producer Evan Rogers, who discovered the Barbados-born beauty, insists Rihanna - whose boyfriend Chris Brown has been charged with felony assault and making criminal threats after allegedly assaulting her - is confused by the conflicting advice she has been given.

He said: "I think that everyone has good intentions and means well, but it turns up the heat in terms of it seeming like the whole world is telling her what to do.

Whitney Houston has urged Rihanna not to take Chris Brown back. The legendary singer reportedly warned Rihanna to cut all ties with Chris after the "Run It" star was arrested for allegedly beating her up.

Whitney - who had a violent relationship with ex-husband Bobby Brown - is believed to have spoken to Rihanna, telling her: "Don't make the same mistakes I did."

Whitney Houston made her stage comeback at a pre-Grammys party on Saturday. The 45-year-old singer looked in good health as she performed in a figure-hugging animal print dress at the 2009 Grammy Salute to Industry Icons show, in honor of record industry boss Clive Davis.

Her return to the stage has been hailed a triumph, with Whitney - who has publicly battled addition to crack-cocaine and endured a bitter break-up from singer Bobby Brown - told the crowd "I got it! I got it!" before launching into her hits "I'm Every Woman" and "I Will Always Love You."

Amy Winehouse's husband is planning to appear on her favorite TV show to win her back.

Blake Fielder-Civil - who has been in rehab since leaving prison last month - reportedly thinks starring on reality series "Celebrity Big Brother" would be the perfect way to prove his love for the troubled singer and show he has quit drugs.