Taylor Swift, Emma Watson flash their huge diamond rings

Taylor Swift, Emma Watson flash their huge diamond rings

Ring-a-ding-ding! Taylor Swift showed off her engagement ring — and two additional surprise diamond wedding bands — during her glitzy “Tonight Show” appearance to promote “The Life of a Showgirl.” Meanwhile, Emma Watson, who is presumably single, caused a stir with a massive sparkler on her left-hand ring finger. Find out what the “Harry Potter”...