At 20 MTV is showing its age. Have Madonna, Britney Spears, and Christina Aguilera bring faux lesbo to basic cable? Yawn. Now if the trio had kicked off the network's Video Music Awards sporting Les Pauls and covering a Molly Hatchet or April Wine fret fest, we'd all still be agape. Hell, a few windmilled A-chords, something, anything different from this crew.