Season 9 Episode 14 episode 14

How I Met Your Mother Season 9 Episode 14 "Slapsgiving 3" Spoilers: Mystery Music Guest Booked!

How I Met Your Mother Season 9 Episode 14 "Slapsgiving 3" Spoilers: Mystery Music Guest Booked!

S9 CAST
A new spoiler tidbit has emerged for How I Met Your Mother season 9, episode 14 "Slapsgiving 3".

Creator Craig Thomas has revealed via a tweet that a new musical guest is set to appear on the show saying "Just booked an amazing musical guest for our "Slapsgiving 3" episode...stay tuned! #HIMYM".

Source: Craig Thomas's Twitter

Who do you think will be the 'amazing music guest' set to appear?