The Allentown Fair is getting a double dose of teen star power.

Officials announced Friday that singing sensations Austin Mahone and Bridgit Mendler will headline a show at the fair on August 28th.

Mahone is known for his chart-topping hits "11:11" and "Say Somethin'".

Mendler stars on the Disney show "Good Luck Charlie" and her first album debuted at number 30 on the Billboard charts.

Tickets for the show go on sale March 2nd..and they cost between $25 and $39.