The GRAMMY-winning Broadway musical Wicked is turning 15 this year, and it's still going strong. The musical that won Best Musical Theatre Album at the 47th GRAMMY Awards is now bringing together GRAMMY nominees Ariana Grande, Ledisi and Adam Lambert as well as GRAMMY winners Pentatonix to perform with original cast members Idina Menzel and Kristin Chenoweth to celebrate the 15 years of magic.

<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">Fellow Ozians—it’s official. The 10/29 <a href="https://twitter.com/hashtag/Wicked15?src=hash&amp;ref_src=twsrc%5Etfw">#Wicked15</a> Anniversary Concert on <a href="https://twitter.com/nbc?ref_src=twsrc%5Etfw">@nbc</a> will feature <a href="https://twitter.com/idinamenzel?ref_src=twsrc%5Etfw">@IdinaMenzel</a>, <a href="https://twitter.com/KChenoweth?ref_src=twsrc%5Etfw">@KChenoweth</a>, <a href="https://twitter.com/PTXofficial?ref_src=twsrc%5Etfw">@PTXOfficial</a>, &amp; <a href="https://twitter.com/ArianaGrande?ref_src=twsrc%5Etfw">@ArianaGrande</a>! Stay tuned for more info &amp; thrillifying surprises! <a href="https://twitter.com/TODAYshow?ref_src=twsrc%5Etfw">@TODAYshow</a> <a href="https://twitter.com/hashtag/Wicked?src=hash&amp;ref_src=twsrc%5Etfw">#Wicked</a></p>&mdash; Wicked the Musical (@WICKED_Musical) <a href="https://twitter.com/WICKED_Musical/status/1045293072240857089?ref_src=twsrc%5Etfw">September 27, 2018</a></blockquote>
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The musical debuted in San Francisco, Calif. in 2003 and is based on Gregory Maguire's book, Wicked: The Life And Times Of The Wicked Witch Of The West influenced by L. Frank Baum's The Wonderful Wizard Of Oz. To honor the humorous and touching story about a green witch named Elphaba, a special called A Very Wicked Halloween is airing on Oct. 29 and will feature an all-star line-up.

"The themes of the show, the love and friendship aspects," Chenoweth told the San Francisco Chronicle. "We can look at these two characters looking forward to seeing everything."

Mitch Grassi from Pentatonix says it's full circle for him performing in the special. "It's a full circle moment, we grew up with this show and the [album] kind of shaped us as performers," Grassi told Playbill.

Indeed, 15 years later, the show is still a hot ticket, still touching audiences and still wicked!

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