ABC Apologizes for Nicki Minaj Nip Slip

ABC says the network DID have a 5-second delay in place on "Good Morning America" this morning ... but insists Nicki Minaj's nip slip just happened to fall through the cracks.

A spokesperson for the network tells TMZ, "Although we had a five-second delay in place for the Nicki Minaj concert on GMA , the live East Coast feed of the concert regrettably included certain fleeting images of the performer that were taken out of later feeds of the broadcast in other time zones."