Watch Beauty And The Beast Stars Sing A Classic Tune Live

As part of the promotional tour for Beauty and the Beast, composer Alan Menken appeared at a Beverly Hills press conference on Sunday and played some tunes from the movie. Video from that event has surfaced, including a sequence where Josh Gad (LeFou) and Luke Evans (Gaston) join Menken on stage to sing the famous song, "Gaston."

Be sure to stick through (or skip to) the end, as Gad does some excellent ad-libbing. Here is the video, which was captured by Inside the Magic (via Entertainment Weekly):

Menken wrote the music for 1991's Beauty and the Beast alongside lyricist Howard Ashman, who died before the original came out. The new movie features songs from the original containing lines that Ashman wrote but were not included in the original.

There are also brand-new songs that Menken wrote with Tim Rice.

Beauty and the Beast opens on March 17. It also stars Emma Watson as Belle, Dan Stevens as Beast, Ian McKellan as Cogsworth, Kevin Kline as Maurice, Emma Thompson as Mrs. Potts, and Stanley Tucci as Cadenza, a character not seen in the 1991 animated movie and invented for the new version. The film is directed by Twilight's Bill Condon.

It is expected to have a huge opening in the US, where it could make as much as $120 million for its opening weekend, according to estimates. If it can cross $100 million, that would make it one of the biggest March openings in movie history.

For more on Beauty and the Beast, check out GameSpot's review and what other critics are saying.