Flirty makes me think "I Enjoy Being a Girl" from Flower Drum Song or "I Feel Pretty" from West Side Story but I think those are both soprano songs. There's also "I Cain't Say No" from Oklahoma but I think that might be mezzo. What range is "I Can Hear the Bells" from Hairspray in? "Gorgeous" from The Apple Tree? "How Can I Wait" or "All For Him" from Paint Your Wagon? "Lovely" from A Funny Thing Happened on the Way to the Forum is way too high but it would be cute if you want to be one of the triplets.
If you have to sing with accompaniment, I'd see if you could find someone to transpose the music for you beforehand.