Popsugar Celebrity Celebrity Instagrams John Legend Celebrates 42nd Birthday With Maths Competition Chrissy Teigen Went All Out For John Legend's Birthday Maths-Off Competition — See the Pics! 29 December 2020 by Yerin Kim Image Source: Instagram user chrissyteigen Forget the typical dinner party — John Legend celebrated his 42nd birthday with a maths-off hosted by Chrissy Teigen, and it looked pretty damn fun, considering it was all about maths. On Dec. 28, Chrissy teamed up with friend and celebrity hairstylist Jen Atkin to create the "ultimate surprise maths competition" for their husbands, complete with game cards, bonus questions, and spot-on costumes. Lucky for us, the cookbook author shared a few glimpses into their intimate soirée on her social media Monday night. As the game was based on sixth grade maths questions, John and Mike Rosenthal fittingly wore suspenders, bowties, and of course, name tags. Chrissy and Jen, on the other hand, wore sparkly pink gowns in their roles as game show hosts. "John and Mike love doing maths, and so that's what he gets for his birthday," Chrissy said with a laugh on her Instagram Stories. The four went all out with their celebration — John and Mike really take their maths knowledge seriously — and the "Never Break" singer ultimately took home the first place trophy. Look ahead to see all the fun moments from John's special birthday surprise. Related: Chrissy Teigen Gets John Legend the Same 2 Gifts Every Christmas, and He's a Big Fan we created the ultimate surprise math competition for John’s birthday. we’ve played this on vacay before but NOT LIKE THIS ladies and gentleman pic.twitter.com/aooC0fM1Wx— chrissy teigen (@chrissyteigen) December 29, 2020 1 / 6 Image Source: Instagram user chrissyteigen 2 / 6 Image Source: Instagram user chrissyteigen 3 / 6 Image Source: Instagram user chrissyteigen 4 / 6 Image Source: Instagram user chrissyteigen 5 / 6 Image Source: Instagram user chrissyteigen 6 / 6 Celebrity InstagramsJen AtkinCelebrity BirthdaysChrissy TeigenJohn Legend