Best of 2011: Jennifer Lopez's Sizzling Comeback

All hail J.Lo!

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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).

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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.

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

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