Lady Gaga. That's right, he bet (signed to record label) on her before she blew up like a person would on HGSI when it was at 0.45:
http://new.music.yahoo.com/akon/news/akon-says-lady-gaga-pretty-much-retired-me--61999241
http://new.music.yahoo.com/akon/news/akon-says-lady-gaga-pretty-much-retired-me--61999241