During a recent show in Connecticut, Cassadee Pope surprised those in attendance with a performance of Hey Monday’s “6 Months.” Pope fronted Hey Monday from 2008 through 2011, which is when the band went on hiatus and she pursued a solo career. In 2012, she won the third season of NBC’s The Voice and launched her solo career to new heights. Pope released her debut solo LP, Frame By Frame, in the fall of 2013. The effort debuted at No. 9 on the Billboard Top 200 chart, selling around 43,000 copies.

Watch: Fall Out Boy perform “Sugar We’re Going Down” live with Cassadee Pope