He's more used to 'photo bombing' other people's evenings, but Neil Patrick Harris was on his best behaviour 30th Annual Musical Celebration Of Broadway, where he was guest of honor. 

Neil Patrick HarrisNeil Patrick Harris Was The Guest of Honor

Attending the celebration with his partner, David Burtka, Patrick-Harris's career was celebrated. Actress Whoopie Goldberg hosted the evening and entertainment was co-directed by Tony Award winner Michael Mayer with Johanna McKeon. Other stars at the glitzy event included Zachary Levi and Kal Penn

"We are overjoyed to add Neil Patrick Harris to the legendary roster of artists who have been honoured at the Musical Celebration of Broadway during the last 30 years," Drama League Executive Director Gabriel Shanks said.  

"After distinguishing himself in film, television, theatre, web series, music, and as a staunch advocate for youth and arts education like that provided by The Drama League, Neil's return to Broadway this season is cause for celebration."

It could have been oh-so different for Harris, though, as it was revealed on Reddit that his show, 'How I Met Your Mother', was saved from getting canned by 2008 guest star, Britney Spears. 

britney SpearsBritney Spears Saved 'How I Met Your Mother'?

"We got a call... saying that Britney Spears wanted to be on our show. And she specifically wanted to be in the episode Ten Sessions, which sent a chill down our spines, because that's the one where we meet Stella," explained the show's co-creator, Cartet Bays.

"I immediately imagined Britney playing Stella and had a minor panic attack, because it's such a big role and needed an (sic) proven, experienced actress like (Scrubs actress) Sarah Chalke. But to her credit, Britney liked the character of Abby, and wanted to play that part. So we said sure!" he added.

"And by golly she put our show on the map. It can't be overstated. Britney Spears rescued us from ever being on the bubble again. Thanks Britney!"