Glee Effect

Three artists who are affected by Glee:

Beyonce - Single Ladies where Kurt danced to it on the football field whilst scoring try

Rhiana - Take a Bow

Lady Gaga - Glee club had to dress up in Gaga-inspired clothes and sing one of her songs

This caused the artist to have their song's popularity raised but the con of this secondary licensing is that the artist itself may not be as well known. Also viewers may start to prefer the glee version of the song than the original hence purchasing that version so the artist do not get any money.