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'Full House' stars photo-bombed by Rihanna on 'GMA' reunion (Photos)

Rihanna photo-bombs 'Full House' stars John Stamos, Dave Coulier and Bob Saget on ABC's 'Good Morning America' on Jan. 29, 2014. <span class=meta>(pic.twitter.com/yuBk6dt89R / twitter.com/GMA/status/428524322123436032)</span>
January 29, 2014 6:31:23 PM PST