Justin Bieber

He’s sold more than four million albums in the last two years and is a more or less constant presence on the iTunes and Billboard charts. So when Justin Bieber announced that he was recording a Christmas album for this year’s holiday season, it automatically became one of the fourth quarter’s most highly anticipated releases. At this point, Bieber could probably hum carols through a kazoo and turn

When Justin Bieber showed up onstage at Taylor Swift‘s August 23 show for a surprise duet rendition of his hit ‘Baby,’ their impromptu collaboration made the concert memory of a lifetime for several thousand concertgoers and set news feeds abuzz for the rest of the week. And as it turns out, that might not be the last we hear from the young megastar duo.

It was impressive enough that Taylor Swift booked a four-night run of sellout performances at L.A.’s Staples Center. Then she went and added surprise cameos from Justin Bieber and Jason Mraz, who each popped up for unannounced duets. Sunday night marked the end of Taylor’s Staples residency, and she had yet another surprise special guest for her fans: Ellen DeGeneres.