The singer, 36, made her way to Wireless Festival in London to watch fellow American stars Pharrell Williams and Kanye West perform.
She caught up with the superstar boys backstage, too, and posted a snap from her evening on Instagram.
Nicole said: "Happy 4th of July from London #WirelessFestival ! #YourLove @pharrell @kanyewest."
Celebrating USA's Independence Day on Friday (4 July), Nicole wrapped herself in lots of American flags during her trip to the festival.
Nicole, who is dating Formula One star Lewis Hamilton, has been over in the UK promoting her new single Your Love.
She also managed to squeeze in a trip to Monaco for her 36th birthday at the end of June, and recently posted some super beaut snaps from her celebrations.
Nicole made the most of the south of France sunshine and some delicious looking food with friends for her birthday.
We're also totally loving her fun sunglasses!
Doesn't this just look like the dreamiest birthday party?
Back to Wireless, and Nicole admitted that she was feeling a little bit homesick on the landmark day in America.
She said on Twitter: "In the UK working but Happy 4th of July back home! Missing my family, friends, BBQ, beer, fireworks…"
Oh BTW, Kanye West made some pretty interesting revelations about Kim Kardashian during his Wireless set!
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