It's the boobie battle you've all been waiting for -- 22-year-old "Teen Mom" porn star Farrah Abraham (with her brand new D cups) and the legendary Tanning Mom (with her genuine leather speed bags).
It's actually a hilarious coincidence ... Farrah and 45-year-old Patricia Krentcil both posed for topless photo shoots on the beaches of Malibu Thursday.
Malibu beaches are a hot spot for celeb photo shoots, so it's not that surprising they showed up around the same place -- but it's incredible they BOTH decided to drop their tops.
Farrah Abraham & Tanning Mom
Topless Bikini Showdown
Battle of the Bulges
6/21/2013 9:30 AM PDT BY TMZ STAFF
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