The two singers crossed paths at the #MyTurnToJag party in Hollywood on Tuesday evening (23 July), which was held on the same day as Michelle's birthday, so no doubt there was cause for double the amount of partying!
Posing in a red convertible, both ladies beamed for the camera and looked radiant in their contrasting outfits.
While Kelly - who got stranded on a boat at sea last week - opted for a sports luxe style with a grey cropped top and leather skirt, Michelle went all out in a gorgeous green gown. Well, it was her birthday!
Her glamorous dress featured a black cut out panel around the waist and she accessorised simply with a pair of hoop earrings.
Posting a couple of pictures of her Destiny's Child companion on Instagram - including one of her receiving a giant yellow cake decorated with flowers - Kelly made no secret of the fact that she was happy to be with Michelle on her special day and she encouraged her fans to also send their birthday wishes to the songstress.
And it sounds like Michelle was inundated with messages from friends, family and fans alike, as she then wrote on her Instagram page: "I feel the love!!! Thanking you ALL for the birthday love!!! Keep it coming!!! I'm spoiled!!!"
She also added: "I feel amazing on my birthday this year!!! Thank you Lord for the process to get to this place!!!"
Kelly and Michelle's high profile bandmate Beyoncé was noticeable absent from the celebrations, as she is currently performing around the States as part of 'The Mrs Carter Show' tour.
Which singer's outfit do you prefer - Kelly or Michelle's? Let us know below!