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It seems that [lastfm link_type="artist_info"]Taylor Swift[/lastfm] is turning her brief residency at L.A.’s Staples Center into an all-star event.  Earlier this week, she invited [lastfm link_type="artist_info"]Justin Bieber[/lastfm] on stage to duet on Bieber’s hit Baby.  And last night her special guest was [lastfm link_type="artist_info"]Jason Mraz[/lastfm], joining her for a special rendition of his smash hit I’m Yours.

After the show, Taylor had this to say via her Twitter account:

I couldn't love LA crowds more. I can't believe how awesome tonight was. And thank you @jason_mraz for singing "I'm Yours" with me!!—
  (@taylorswift13) August 25, 2011

And for those of you with a bad case of Bieber fever, take a look at her Baby duet with Justin on the next page.