Brighter Than Stage Lights

The strap dug into her shoulder, the skin underneath burning red from pressure and sweltering, nervous heat. One of the other girls pressed clammy fingers to the small of her back. Outside, the murmur of the audience gave way to applause; it was an invitation brighter than stage lights, matched only in the gleam of her eyes.

Prompt response for Three Line Tales 239. Cheers to Sonya for the challenge!