Kim Kardashian And Five Pregnancies That Have Been Announced During Concerts

During a concert at Atlantic City, N.J.'s Revel Resort, Kanye West announced girlfriend Kim Kardashian's pregnancy.

Concert pregnancy announcements, though rare, are seldom made solely by the expectant father -- so the fact that the reality star was not present during West's big reveal has puzzled many.

Here's a look back at five less-controversial on-stage pregnancy reveals.