'Saturday Night Live' double duty: Justin Bieber to the Rolling Stones

'Saturday Night Live' double duty: Justin Bieber to the Rolling Stones: Feb. 10, 2001 and Feb. 27, 2010

Lopez is one of only a handful to pull double duty more than once for SNL.

(NBC)

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Jennifer Lopez

Feb. 10, 2001 and Feb. 27, 2010

Lopez is one of only a handful to pull double duty more than once for "SNL."

Feb. 6, 2013