Marla Mindelle was running on three hours of sleep Tuesday morning after performing in Titanique Monday night and then waking up early to perform on The Today Show . That’s when the Tony nomination news came in. “About 10 seconds before the performance, I found out that I was nominated. And then they’re like, ‘You’re on in five, four…” Mindelle said. “It’s once in a lifetime, I was like, this may never happen again.” Mindelle received a Tony nomination for her role as Céline Dion in the Titanic parody musical, as well as a nomination for best book of a musical, after writing the book to the show alongside co-star Constantine Rousouli and Tye Blue.…