"It's not really my nail polish line. Like, I think it's weird to think about that," he said at a recent event to promote his autobiography, "First Step 2 Forever: My Story."
Bieber says the nail polish from Nicole by OPI, which is set to hit stores next month, is inspired by his hit songs. "Like, there's names like named after my music," he said.
"I don't know," he said. "It's like a really weird concept."
The collection, called One Less Lonely Girl, is set to include a bright red shade called OMB! and a glittery polish named Step 2 the Beat of My Heart.
Members of Bieber's team chimed in to add that the impetus for the nail polish line was OPI's willingness to donate to Pencils of Promise, a school-building organization Bieber has supported before.
"So do you want me to say that?" Bieber asked, then turned to a reporter and said, "Yeah, a portion of it goes to charity, so that's always good."