NME — Britney Spears and Justin Timberlake joined Madonna on stage in Los Angeles last night (November 6), but they didn't perform together. more info

ET Online — Britney Spears wasn't the only one who made a guest appearance at Madonna's concert last night! The material mom was joined on stage by Justin Timberlake for a rousing rendition of their duet, "Four Minutes to Save the World." Watch Madge a... more info

PopSugar — Rihanna passed out on stage during her concert in Sydney earlier today. She was performing "Umbrella" with Chris Brown when she fainted and was led to paramedics and so far no update has been given on her condition. Britney Spears and Jared Leto'... more info

Britney Spears makes an on-stage appearance with Madonna during her show at the Dodgers Stadium in Los Angeles. more info

AP - Britney and Justin still share one bond: Madonna. more info

Yahoo! Music — AP - Britney and Justin still share one bond: Madonna. more info

Perez Hilton — A-MA-ZING! The stars weren't only in the audience at Madonna's Sticky Sweet LA concert on Thursday. The rumors actually turned out to be true!! Both Britney Spears and Justin Timberlake hit the Sticky Sweet stage! BritBrit made her appearance in the... more info

The Newsroom — Madonna's high-energy show in Los Angeles impressed fans, including joint performances with Britney Spears and Justin Timberlake. (Nov. 7) more info

Topix — Rumors are swirling that Justin Timberlake and Britney Spears are to appear tonight at Dodger Stadium in Los Angeles. more info

PopSugar UK — The big winners at last night's MTV Europe Music Awards were Britney Spears and Jared Leto's band 30 Seconds To Mars, each of them winning two awards. Hostess Katy Perry beat Duffy to take home the award for New Act, and the Brits were represented by... more info