WITH DRAKE LAID UP! LIL WAYNE BRINGS OUT CHRIS BROWN AS A SURPRISE GUEST ON THE AMERICAS MOST WANTED TOUR!

The America's Most Wanted tour had a surprise guest on Sunday night when it rolled into the Verizon Wireless Amphitheater in Virginia Beach, Virginia, two nights after Drake was forced to leave the tour after seriously re-injuring his knee.
In his first onstage appearance since pleading guilty to assaulting Rihanna in February, singer Chris Brown jumped onstage near the end of headliner Lil Wayne's set, according to clips that popped up on YouTube on Monday morning. Brown, who is from Virginia, helped out by lending his voice to Drake's "Every Girl," and paid tribute to Michael Jackson by as "Billie Jean" played in the background at the end of the night's show. Wayne asked the crowd to make noise for "the new Michael."

The surprise appearance at the Young Money gig was Brown's first public appearance since releasing a video on July 20 in which he apologized to Rihanna for the assault on the eve of the Grammys, which left her with facial contusions and cuts. Brown pleaded guilty last month to one count of felony assault and was ordered to perform 180 days of community service in Virginia as part of his plea deal.

Spokespeople for Brown and Young Money had not responded to MTV News' requests for comment at press time, and it was unclear if Brown will be performing on other dates on the tour, which is scheduled to last through August 23. Brown appeared to be trying to fill a gap created when Drake went down on Friday night at a show in Camden, New Jersey, where he re-injured his already torn up knee, requiring immediate surgery. Drake blogged about being laid up over the weekend.