Demi Lovato Joining 'Glee' for 'Significant Arc'
is closing a deal to join Glee's
upcoming fifth season for "a significant arc," TV Line
reported exclusively on Monday. The X-Factor
judge will play Rachel and Santana's "struggling-artist friend" Dani, who will also have a tie-in with Adam Lambert's
guest arc. (Hint: They'll be singing together.) Lovato's gig, which is said to run for at least six episodes, will kick off during the show's second Beatles tribute on Oct. 3.