Top Shots of the Week

Miss any of the week's most memorable moments, like Taylor Swift and Selena Gomez's duet or Lady Gaga opening a Santa-style workshop? Check out this week's Top Shots!

Fans got two for the price of one during Taylor Swift's big concert at Madison Square Garden on Tuesday night, when Selena Gomez showed up on the stage to perform a duet with her pal! "One of my best friends is such an amazing singer and after four years of being best friends we have never stepped on stage together and I think that's such a shame,"
And the winners are ... J.R. Martinez and Karina Smirnoff! America voted to make the Iraq vet-turned-actor and the pro ballroom dancer the latest "Dancing With the Stars" champs on Tuesday.

 Lady Gaga did the honors at the ribbon cutting ceremony for "Gaga's Workshop" at Barneys New York on Monday. The 5,500-square-foot holiday display, which takes up the entire fifth floor of Barneys, resembles Santa's workshop with a Gaga flair. (11/21/2011)