Justin Timberlake -- I APPROVE of Miley Cyrus' MTV VMA Twerkfest

Justin Timberlake has given his official STAMP OF APPROVAL to Miley Cyrus and her crotch-thrusting, bear-grinding twerkfest at the MTV VMAs ... saying, "It's not like she did it at the Grammys."Justin appeared on 102.7 in NYC this morning and told...