The yummy mummys bumped into one another at the Made In America music festival in Amber's native of Philadelphia, where they were each supporting their rapper husbands.
Since Jay Z painstakingly curated the impressive festival, Beyoncé showed her support by putting on a dazzling performance on Saturday night (31 August), which saw her sing a number of hits in stunning costumes taken from her 'Mrs Carter Show' tour.
Meanwhile, 29-year-old Amber proved that she is her husband Wiz Khalifa's biggest fan by heading down to the event and cheering him on while he performed on Sunday evening (1 September).
Both women then also found time to catch up with each other over the weekend and swap stories about their adorable children.
Amber - who is mum to six month old Sebastian "Bash" Taylor - posted a photo of herself sitting next to Beyoncé in what appeared to be a golf buggy and wrote: "My sweetheart @beyonce and I chopped it up about Bash & Blue Ivy they're gonna get married 1 day.... Bash likes older women Lol"
We wonder if they ended up arranging a play date too for 1-year-old Blue to meet Bash!
In the sweet snap Beyoncé can be seen wearing an Aztec print T-shirt, eye-catching sunglasses and a chunky gold, red and black necklace.
Meanwhile, Amber wore a printed pink and black outfit and turned heads by sporting a cross symbol in the middle of her forehead, which almost resembled a tattoo.
She finished her striking look with a hot pink lip and lashings of black eyeliner. Her portrait tattoo of hubby Wiz was also on full display.
Amber and Wiz quietly got married back in July in a private ceremony at a registry office. They then tied the knot again in front of all their family and friends in Pittsburgh last month.
What do you think of Beyoncé and Amber's festival fashion? Let us know below, as the best comment each week wins £50!