More Celebrity HQ picture and gossip

“You think you’ve heard LOUD screaming in your life,” - tweeted after her Los Angeles show on Tuesday night. “Then [Justin Bieber] comes out and does a surprise song during your show. Woah. Unreal.”

Yes, Bieber made a surprise appearance during the Swifty concert. These two have been longtime friends (even moreso now that he’s dating her BFF, Selena Gomez) so while we’re sure fans were shocked, it can’t have come as that much of a surprise.

“We should do that more often. great show! #muchlove,” Bieber tweeted to Swift.

The pop favorites sang a duet on Bieber’s song “Baby.” Bieb’s manager, Scooter Braun, was sitting on the secret beforehand. “Had to keep it a secret all day. But [Bieber] just came out and sang BABY with [Swift] at STAPLES. EPIC ROAR! #greatmoment,” he tweeted.

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July 8, 2011 2:10 AM ET

British newlyweds Prince William and Catherine, Duchess of Cambridge (aka Kate Middleton), won’t just be rubbing shoulders with celebrities during their first official visit to Los Angeles.

The royals plan to make a stop at Skid Row, the 50-square block area of Los Angeles that houses more than 4,000 homeless people. - to the Associated Press, Wills and Kate will stop off at Inner-City Arts, a non-profit academy that gives kids from the lower end of the socio-economic ladder free classes in the arts.

While in California, the couple will also visit a Santa Barbara polo ground where, - the Los Angeles Times, a plastic surgeon will be standing by in the event Wills is bashed in the noggin by another player.

The couple will - be staying in the Hancock Park neighborhood — far away from downtown’s Skid Row — in a home designed by Wallace Neff. The 7,000 square foot home has been owned by the British Consulate since 1957.

On Saturday, the couple is due to attend a black-tie dinner in support of BAFTA (the British Academy for Film and Telivision Arts) that will, we’re sure, be star-studded.

On their last day in Canada, Kate and Wills visited a rodeo demonstration in Calgary.