"I’m so f--king proud of you," the singer wrote.
The married couple joined the pop star and tight end in Europe amid the Eras Tour.
The musician was previously married to fellow country star Carly Pearce.
The couple is now Instagram official.
The 26-year-old model also co-stars in the "360" music video.
From The Estefans to Camilo & Evaluna, see the love birds of Latin music below.
The "Espresso" singer also said Demi Lovato looked "stunning" at the event.
The couple watched Lana Del Rey's headlining set at the festival.
The tight end said you'll probably see him supporting her European Eras Tour dates, too.
“There will always be a tether to him, no matter what,” the actress said of her relationship.
