Halsey Suffered a Nip Slip at Delta's Pre-Grammy Event!

Uh-oh – Halsey says she totally had a nip slip at last night’s pre-Grammy party!

The Delta Air Lines official 2017 Grammys event took place at Beauty & Essex on Thursday (February 9) in Los Angeles.

The 22-year-old “Colors” singer, who performed at the party, took to Twitter to share her experience with fans.

“My undershirt fell down on stage tonight,” she wrote. “Grammy nominated nipples.

She added, “Thank you @Delta for celebrating first time Grammy nominees like me! And for the fun & charity we accomplished tonight! #DeltaGrammyParty.”

Also in attendance at the event were Elle King, Daya, Serayah, Gabby Douglas, Serinda Swan, and Kirstin Maldonado.

Halsey is nominated for Best Pop Duo/Group Performance for her work on “Closer” with The Chainsmokers at this weekend’s award show.

Click inside to see which Grammy awards the other ladies are nominated for…

Elle is up for Best Country Duo/Group Performance for her performance on “Different for Girls” with Dierks Bentley. Daya is nominated for Best Dance Recording for her work on “Don’t Let Me Down,” also with The Chainsmokers.