Chelsea L. Ostrander ’10 of the Muses serenades the crowd with “It Ends Tonight,” originally by the All-American Rejects, at the Greater Boston Invitational Songfest on Saturday. GBIS is an annual concert held during Parent’s Weekend that showcases all of MIT’s a cappella groups.

Diana Ye­—The Tech

Chelsea L. Ostrander ’10 of the Muses serenades the crowd with “It Ends Tonight,” originally by the All-American Rejects, at the Greater Boston Invitational Songfest on Saturday. GBIS is an annual concert held during Parent’s Weekend that showcases all of MIT’s a cappella groups. Diana Ye­—The Tech