Kate Upton's Boobs

Wobble-dy Wobble-dy Wa

Wobble Wobble

2/14/2012 12:55 PM PST BY TMZ STAFF

"Late Night with David Letterman" registered a GREAT GOOGLY MOOGLY on the Richter scale yesterday -- when voluptuous Sports Illustrated cover model Kate Upton and her heaving chest paid the TV host a very welcome visit.

The best part about this video is playing it again ... and again.