Slumber PARTYYYYYY. Who says the fun has to stop?! This image appears in the gallery:POP BFFs! 11 Reasons We LOVE The Friendship Between The Vamps 8. Slumber PARTYYYYYY. Who says the fun has to stop?! Picture: Instagram 11 images See the full gallery: POP BFFs! 11 Reasons We LOVE The Friendship Between The Vamps