Magnifique
It can be superbe, adorable or splendide, beau (belle)
visages magnifiques prounced visages manglafeex
Break a leg is "merde" or "je vous/te dis merde". Vous for someone with whom one is less familiar, te for a friend. The gorgeous part is a question of gender "mon beau" for a man, "ma belle" for a...
Salut poupée!