Darren Criss is back on stage in the hit musical Maybe Happy Ending, once again starring in his Tony Award-winning role of Oliver. On Monday, he joined TODAY with Jenna & Friends to discuss returning to the show, winning a Tony, receiving his first-ever Grammy nomination, and more. "I have to say, being away from that show was exhausting," he admitted. "Being back in the show, it's nice to have a regular schedule…