Elvis Duran caught up with Puth Friday night at Z100's iHeartRadio Jingle Ball in New York City, and the New Jersey native admitted that he was overwhelmed by the hundreds of text messages after the nominations were announced -- which he happened to be flying during.
"I thought maybe one GRAMMY nomination," Puth said. "I was coming from London, and I touched down on the tarmac, and I got a hundred text messages. I thought there was an emergency! It said, 'Urgent, urgent! GRAMMY, GRAMMY, GRAMMY.'"
"See You Again" was written as a tribute to the late Paul Walker and featured on the soundtrack for Fast and the Furious 7, which Walker was filming at the time of his death in December 2013. The hit tune earned nominations for Song of the Year, Best Pop Duo/Group Performance and Best Song Written for Visual Media.
Despite not knowing the actor outside of his films, Puth told ET that Walker has had an incredible impact on his life.
"I had never even met Paul, and he's the reason I have a music career right now," Puth said. "He's the reason why Vin Diesel and I have a great friendship. Would you even pair me and Vin Diesel as friends? We're best friends now."
The "Marvin Gaye" singer added that both he and Diesel lost friends in situations that were "so parallel to each other," which not only helps them talk about their losses, but it's also how Puth came to write and record the song.
While he already has collaborations with Khalifa and Meghan Tranior under his belt, Puth revealed that he's been working on a song with another major name -- Selena Gomez. The track will be featured on his debut album, Nine Track Mind, dropping in January.
He went over to Gomez's place to fill her in on some music he had been working on, and the 23-year-old pop star started singing the melody. Puth liked the "very airy tone" he heard, and the rest was history. "I'm very lucky to be working with her," he said, also noting that the "Good For You" singer is "so easy to work with."
See the adorable GRAMMYS reaction Puth shared exclusively with ET in the video below.