Camden's Susquehanna Bank Center is celebrating two decades of hosting some of the spring/summer season's hottest concerts by giving away lawn seats for just $20, for a limited time.

The "20 for 20" promo is going on now through May 20th and fans can grab cheap tickets for – you guessed it – over 20 shows currently on sale at the venue. That means the Radio 104.5 Birthday Show, Tim McGraw, Backstreet Boys, Lionel Richie, both days of the XPoNential Music Festival and much more.

Check out the full list of eligible concerts below: (get tickets here)