The songstress, 34, looked breathtakingly gorgeous in a black off-the-shoulder gown, which she paired with matching heels and a clutch purse — but some could argue that her best accessory was her date, boyfriend Rich Paul, 40, who went with a classic tux.
In snaps from the shindig, the lovebirds flashed a smile alongside basketball legend LeBron James and wife Savannah. Each of the foursome looked on par with the Great Gatsby theme, with the bride radiating beauty in a custom lace gown by Ralph Lauren.
Paul and the mom-of-one first sparked romance rumors around one year ago when they began stepping out to basketball games together. Nowadays, the pair "are solid," a source spilled earlier this month. "They're definitely considering getting engaged and having kids."
The Grammy winner has even been seen wearing a giant diamond ring on that finger, but she's never commented on the speculation. However, Paul recently hinted the two could be starting a family somewhere down the line (Paul is currently a dad-of-three, while the Brit shares son Angelo, 9, with ex-husband Simon Konecki).
"As a young dad, growing a business, it was pretty tough," he confessed when dishing about trying to balance work and family life. "But now looking as an older dad, if I was to have more kids, I'm looking forward to being a different dad ... a more patient dad."
"Oftentimes as you're building a business, you're on the go, you're moving around, the kids grow up fast in a blink of an eye. Next thing, you know, they're walking and they're riding the bike, running and flipping around and that's the problem," continued the sports guru. "You know, I have a daughter that's a junior in college so I was a very young dad, but now, different age, different time in my life, different position in my life. I'm really looking forward to being an older dad."