Katy Perry recently congratulated her ex-boyfriend Josh Groban on his engagement to stage actress Natalie McQueen in a humorous Instagram video. In the clip, Perry dons a white robe and pretends to be heartbroken while toasting to Groban's engagement, which is highlighted by her 2010 hit 'The One That Got Away' playing in the background. This song has often been speculated to be inspired by Groban, whom Perry dated briefly in 2009. Despite their past romance, both have expressed mutual respect and friendship over the years. Groban, who announced his engagement in April after proposing at Disneyland, was surprised by Perry's nostalgic tribute, acknowledging their chemistry and shared humor during their relationship.