It may be 2015, but Gwen Stefani still doesn't get why selfies are so popular.

Stefani, who only joined Instagram in January 2014, admitted to the British edition of Cosmopolitian that the whole idea of selfies and Instagram took her a long time to adjust to.

"It took me a while to get into. It's so awkward," Stefani told the magazine. "Who said it's OK for me to sit in my kitchen and take pictures of myself until I find one I like?"

Despite calling it awkward, Stefani occasionally follows the trend and uploads a selfie like everyone else.

Her most recent selfie was a month ago in front of a plane just before she flew out of Washington, D.C.