Today is Lea Michele's 27th birthday! The Glee actress has experienced a tough past few months coping with the tragic loss of her on-screen love interest and real life boyfriend Cory Monteith, so we hope Lea spends today surrounded by friends, family and, of course, cake!

In honor of the talented actress and singer's big day, we've rounded up 10 of her best performances from Glee. Her voice is so strong and angelic that a few of the songs made us tear up.

Click through, then let us know in the comments below which performance you love most. Don't forget to leave your birthday wishes, too!