Taylor Swift on Sugar magazine   Taylor Swift not a party girl

LOS ANGELES, Calif. -- Taylor Swift may be in the middle of her first headlining tour, but she got a little help from John Mayer on Friday night.

Videos fans posted on YouTube show the guitarist joining the country cutie at Staples Center on his own “Your Body Is A Wonderland” and Taylor’s “White Horse.”

“Is it all right if he stays up here for another song?” Taylor asked the audience after dueting on “Your Body Is A Wonderland” before the pair started strumming “White Horse.” John played a scorching blues solo on the second track, earning cheers from the crowd, who sang along to every word with the two musicians.

“I can’t believe the Lakers get to play in the same arena that Taylor Swift performed in!,” an impressed John Tweeted after the show.

Taylor’s tour continues with a sold-out show in Las Vegas on Saturday night.