Rita Ora -- Star-Spangled Nipples (PHOTOS)

Rita Ora put her love for the good ole U.S. of A. on full display ... on her nipples.

Ora fell 48 stars short of a true American flag salute after her Wednesday night show at the El Rey Theater in L.A. -- though we doubt she heard a single complaint about it.

Perhaps next time ... Rita can take a few pasty pointers from Miley Cyrus, who definitely wore them better last night on "Jimmy Kimmel Live!"

They are a party in the U.S.A.