1. Lucky you! Lucky me!

　　2. It was just dumb luck.

　　3. It's your lucky day.

　　4. You got lucky.

　　5. Today's my lucky day. I feel lucky today.

　　6.luck out

　　I lucked out and got home right before the rain came down.

　　I lucked out and won two tickets to Taylor Swift's concert.

　　You lucked out. This is the last one.