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AMA flashbacks: Michael Jackson and Janet (1975); Mariah Carey (1993); Britney (2001)

Before the American Music Awards air this weekend, we're looking back at the 2nd Annual AMA show where a teenaged Michael Jackson enlisted the help of his 9-year-old sister Janet.

And the 1993 show, where Mariah Carey remembered everyone that's helped her along the way.

Finally the 2001 show where Britney Spears made headlines.