And back in the U.S. at an event in New York, he insisted his baby brother and his new wife are perfect for each other.
"Seeing Nick's face when he first met her, and the way he talks about her, and then getting to meet her and seeing what an amazing person she is, I knew right away that they were a match made in heaven," Joe smiled in a chat with Entertainment Tonight at a J.C. Penny event. "My face hurts from smiling so much. The ceremonies themselves were so beautiful. The Indian ceremony, for me, was something new. We were all in tears."
And the singer admitted seeing his brother wed has made him even more excited for his forthcoming nuptials to "Game of Thrones" actress Sophie.
"I am (so excited)," Joe gushed. "You know, I didn't even think about it much to be honest because it was about them. This whole week, we just let the celebration be about Nick and Priyanka."
The couple's celebrations were slightly marred after Priyanka was accused of being a "scam artist" in an article published in New York Magazine's The Cut on Tuesday.
The article, which also declared that Nick had "married into a fraudulent relationship against his will," has since been removed completely, however, both Joe and Sophie defended the former "Quantico" star on social media days after she wed.
"This is disgusting," wrote Joe. "@TheCut should be ashamed to have someone write such evil words. What Nick & Pri have is Beautiful Love. Thank u, Next."