When the couple wasn't relaxing in a VIP bungalow at the Marquee Day Club, drinking water and lightly sipping rosé champagne, Ciara, 30, took to a small stage to entertain the sun-kissed crowd.
"You guys are showing up so hard," she told attendees, holding the microphone with her left hand, which was weighed down by her diamond sparkler, which she'd previously flashed only on social media.
"You guys are the best in the world right now."
David Becker / Getty
As she performed, Wilson, 27, stood in the DJ booth behind her, mouthing the words to her songs, as renowned DJ Dash Berlin played her hits.
Following Ciara's performance, the couple retreated to a couch, where they cuddled and took pictures with each other as the Vegas heat hit 80 degrees, toasting the couple and the adoring crowd.
As exclusively revealed to PEOPLE earlier this month, the couple was engaged after Wilson surprised Ciara with a romantic getaway at the North Island resort in the Seychelles.
As Ciara gushed in an Instagram post afterward, ""God Is So Good! I'm So Grateful For You @DangRussWilson. You Are Truly Heaven Sent, and I'm Looking Forward To Spending Forever With You."