Mash Off
The episode features four mash-ups , including the show's 300th musical number , Adele's "Someone Like You" and "Rumour Has It" , which sold 160 , 000 copies in its first week and debuted at number eleven on the "Billboard" Hot 100 . 
<triplet> Someone Like You <subj> Adele <obj> performer <triplet> Rumour Has It <subj> Adele <obj> performer