Emmy-winning actor and singer-songwriter Darren Criss ("Glee") hosts this new one-hour special, the fourth installment in ABC's popular "Singalong" franchise, which invites viewers to gather friends and family and sing along to musical hits by the rock group Queen. The on-screen talent for the show includes Adam Lambert, who in recent years has toured with Queen's remaining members, covering the lead vocals once sung by legendary Queen frontman Freddie Mercury. Other performers include Pentatonix, OneRepublic, Fall Out Boy, JoJo Siwa and Orianthi and Derek Hough.