Katy Perry said she declined to work with Billie Eilish after hearing her song "Ocean Eyes."

Katy Perry said she made the "huge mistake" of declining to work with Billie Eilish because she thought her first song "Ocean Eyes" was boring.

Some commenters noted that they were happy Perry turned down the opportunity because it gave Eilish the chance to develop her music on her own.

Kevin Mazur/Getty Images for ABA Eilish first gained attention in 2015 when she released "Ocean Eyes," which was written and produced by her brother Finneas O'Connell, on SoundCloud, according to Vox.

She has since gone on to achieve global fame and received numerous accolades, including seven Grammy Awards.

After realizing who the actor was and looking at photos of him in the "Pirates of the Caribbean" franchise, Eilish hugged Bloom again before going onstage.