Taylor Swift is turning her Los Angeles residency into a star-studded event - she duetted with Jason Mraz during her concert on Wednesday.
The Love Story hit-maker is playing a string of shows at the Staples Center and earlier this week she thrilled fans by bringing Justin Bieber onstage for a rendition of his hit track Baby.
And Swift introduced another special guest to the crowd on Wednesday, teaming up with Mraz to perform his song I'm Yours.
In a post on her Twitter.com page, she writes, "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!!"