You could try "Glitter and Be Gay" from Candide, "There's No Business Like Show Business" from Annie Get Your Gun, "Adelaide's Lament" from Guys and Dolls, "Morning Person" from Shrek the Musical (very overdone but good choice,) "My New Philosophy" from You're a Good Man Charlie Brown, "Diva's Lament" from Spamalot, "I Aint Down Yet" from The Unsinkable Molly Brown, or "That's Rich" from Newsies. I hope this helps :) Break a leg at your audition!