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Update (3/16 8:15 a.m.): Listen to a snippet here, and buy the song, available now, on iTunes.

Original story (3/15): Before First Lady Michelle Obama hits the stage at SXSW in Austin, Texas on March 16 to give a speech about empowering girls around the globe, she announced on Tuesday (March 15) that she's releasing a new song with some of music's hottest acts.

"This Is For My Girls" is written by Diane Warren and will be unveiled at midnight. It features superstars Missy ElliottJanelle MonáeKelly RowlandKelly ClarksonZendaya, Lea Michele, Chloe x Halle and Jadagrace.

The song supports Michelle Obama's Let Girls Learn initiative, which is aimed at boosting education rates among adolescent girls around the world.

The FLOTUS' keynote on Wednesday will feature Elliott and Warren, as well as Queen Latifah and Sophia Bush. You can livestream it here at 10:30 a.m. CT.