Hot Moms, Britney And Angie, Top "Celebrity Heat Index"

Britney Spears tops USA Today's 2008 "Celebrity Heat Index" for the second year in a row. The ranking measures exposure in print and online entertainment news outlets.

Contributing to the pop star's reign atop the list was the December release of Circus, which topped Billboard charts -- and her two stints in psychiatric wards last January.

Angelina Jolie -- who welcomed twins Knox and Viv in July -- came in second place in the list. Her partner Brad Pitt came in fourth -- behind ex-wife Jennifer Aniston.

Jamie Lynn Spears and Tom Cruise also made the rankings, while Paris Hilton and Anna Nicole Smith were cut this year.

Who do you think is the most exposed celebrity?

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