The 27-year-old singer, who provides the voice for Smurfette in the animated movie, shared a snap of the stars embracing along with the caption: "OMG!!!!! I CAN'T IM CRYING."
Best In Showbiz takes a in-pictures look at moments when entertainment's biggest names were left starstruck by their peers...
Jennifer Lawrence was taken aback when Jack Nicholson suddenly appeared and interrupted her interview following the actress's Oscar win back in February.
Adele looked completely starstruck by Jennifer Aniston as she bumped into the actress on the red carpet at the annual Academy Awards earlier this year. The singer, who later went on to win the Oscar for 'Best Original Song' for her theme to James Bond movie Skyfall, also told Graham Norton that she got the former Friends star's name mixed up following a brief encounter in a New York bathroom.
Adele also admitted that she was starstruck upon meeting Beyoncé at the annual Grammy Awards back in February.
Beyoncé was herself left overwhelmed when she met President Barack Obama with husband Jay Z at a fundraising dinner last year. The singer later went on to perform her rendition of the national anthem at his second presidential inauguration.
David Beckham was starstruck when meeting First Lady Michelle Obama at a sporting event ahead of last year's London 2012 Olympics.
David Walliams said that he was tongue-tied on meeting former James Bond star Roger Moore, explaining: "I was in awe of him – it was really exciting to meet someone like that."
Cheryl Cole claimed she was so starstruck by Beyoncé that she "embarrassed" herself when they met backstage on The X Factor back in 2008.