The indie band, who secured a place in the talent show final on Sunday, have reached number 21 on the iTunes chart with their track 'Sing For The Deaf'.
Harpist Hero, who also won a spot in this weekend's live final, is currently at number 84 with her self-penned track 'Swept Away'.
The two acts' success follows Top 10 hits for fellow Must Be The Music semi-final winners Emma's Imagination and Pepper & Piano. All the money generated by sales of tracks from the show goes to the artists rather than Sky1 or the show's judges.
Missing Andy, Hero, Emma's Imagination, Pepper & Piano, Diathi and The Pictures will battle it out at Wembley Arena for a £100,000 prize fund and the title of series champion.
The Must Be The Music final airs live on Sunday at 7pm on Sky1.