Best of 2011: Jennifer Lopez's Sizzling Comeback

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All hail J.Lo!

After lying low for three years to raise her twins Emme and Max, 3, Lopez, 42, assumed the throne as an American Idol judge, then released Love?, her highest-charting album since 2005 (three singles hit No. 1 on the Dance Club Play charts and one, "On the Floor," went triple-platinum).

Other crowning achievements? A show-stealing performance at the American Music Awards (alongside her 24-year-old backup dancer beau Casper Smart), a Kohl's clothing line and a Fiat ad campaign. "I'm never tired!" Lopez tells Us Weekly.

Indeed. The hot mom brought Smart along for a Thanksgiving vacation to Kauai, Hawaii -- where the two were spotted frolicking on the beach with her children.