i would definitely do cheesy lyrical-incorporated "thank you"s depending on the show such as
wicked-"Thank you to my parents who always encouraged me to defy gravity!"
Light in the Piazza-"This one's for mom..'the beauty is' you."
Spring Awakening-"Thanks to mom and dad who have made living a lot less of a bitch!"
Les Mis-"Thank you to my parents who never left me 'on my own'."
Showboat-"Love and thanks to my fiance...i 'can't help lovin' you!"
"The good news is I have an excellent Tony speech. The bad news is I've had it for forty-five years."-Elaine Stritch