Kick off summer at Adventureland this Memorial Day weekend! The Altoona theme park is making an even bigger splash with a special concert featuring Ceelo Green. The five-time Grammy Award-winning entertainer and former coach on NBC’s The Voice will take the stage on Saturday, May 27 at 6:30 p.m. The concert is included with admission to the park. Adventure Bay water park opens the same day at 11 a.m.