How to Succeed in Business Without Really Trying star Nick Jonas had “the Jonas effect” on Live! With Kelly on January 26, making Kelly Ripa and guest host Cat Deeley swoon almost as much as the starstruck audience. Jonas stopped by to perform one of the musical's signature songs, “I Believe in You,” and chat about getting nervous onstage, Anderson Cooper’s voice-over cameo in the hit production and more. Click below to watch Jonas’ appearance as he makes one lucky fan’s dream come true (if he doesn’t make her nose bleed first!), then see him perform live at the Al Hirschfeld Theatre.