Ashton Kutcher and Mila Kunis were spotted packing on the PDA while attending a Backstreet Boys concert at the Sphere in Las Vegas on Saturday, Aug. 2 The couple danced and sang along to the group's romantic 1999 hit "I Want It That Way"

Ashton Kutcher and Mila Kunis were seen enjoying a night out at the Backstreet Boys concert at the Sphere in Las Vegas on Saturday, August 2. The couple, who have been married since 2015, were spotted showing affection and dancing to the band’s 1999 hit 'I Want It That Way.