Blac Chyna, Kim Kardashian and Kylie Jenner play nice as they do an impromptu karaoke at Khloe's birthday party (video)

The three love twisted triangle friends played nice at  Khloe's birthday party . Blac Chyna and Kylie Jenner are letting bygones be bygones - or at least were for one night. Tyga's ex girls looked like best friends on Monday night as they put their differences aside to help celebrate Khloe Kardashian's birthday. Watch video after the cut

 Blac Chyna, Kim Kardashian and Kylie Jenner play nice as they do an impromptu karaoke at Khloe's birthday party (video)

Moving forward: Blac Chyna and Kylie Jenner were letting bygones be bygones as the joined Kim Kardashian at Khloe's birthday party in Hollywood on Monday night