George Stephanopoulos is renowned for his dry wit and he left his co-star speechless in a hilarious segment on Good Morning America this week.MORE: Inside George Stephanopoulos and Ali Wentworth's monochrome open-plan home in New YorkThe journalist celebrated Michael Strahan with the rest of the GMA stars on Monday's show, ahead of his milestone 50th birthday this weekend.During a gift exchange live on air, George told Michael that he was going to dance for him as a birthday gift.VIDEO: George