The Aces (formerly The Blue Aces) are an American alternative pop band from Provo, Utah. The band has four members: guitarist Katie Henderson, bassist McKenna Petty, and sisters Alisa Ramirez (drums) and Cristal Ramirez (lead vocals and guitars). The Aces joined 5 Seconds of Summer for their Meet You There Tour. Following this tour, they embarked on their own North American headlining tour in support of When My Heart Felt Volcanic, the Waiting For You Tour.