The Christina Aguilera/Adam Levine duet, “Moves Like Jagger,” is sitting on top of Billboard’s Hot 100 chart for the fourth week in a row, and Christina knew it would happen that way all along. It’s the first #1 hit for Aguilera since 2001’s “Lady Marmalade” and probably the only way Mick Jagger will get near the #1 spot again.