Has Mother Monster gotten a little off-track? Here's why we think so
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5. Deciding to put the R Kelly song on her album and not the Cher duet
Look, it's not that we don't like R. Kelly (we do! We really, really do!), but the math is simple: 2 divas + 1 great song = album track. Gaga has never relied much on guest artists in the past, but for "ArtPop," she misstepped by including her Kellz collab "Do What U Want" while ignoring "The Greatest Thing," her deliciously over-the-top disco duet with Cher. The ladies teamed for the tune last year and it was expected to be on at least one of their upcoming albums, but it has yet to be released officially. Instead, "ArtPop" includes "Do What U Want" -- a morally questionable, repetitive electro crawler that's just too tame.