What happens when Hilary Duff leaves the house wearing a ring on her wedding finger?
She ignites a flurry of speculation that she and her boyfriend of one year, pro-hockey player Mike Comrie, are engaged to be married.
Duff's camp is not confirming or denying that Comrie popped the question...
When asked if they're engaged, a rep for the singer-actress did not comment.
Duff was spotted wearing the mystery ring on Friday night when the two hit L.A.'s Il Sole restaurant for dinner.
If it's not an engagement ring, perhaps the bauble was an early birthday present from Comrie, who is an heir to Canada's The Brick furniture empire. Last year, Comrie, 27, reportedly gave Duff a $100,000 Mercedes to celebrate her 20th. She turns 21 on Sept. 28.