John Mayer Joins Fifth Harmony Via Social Media

(Radio.com) Fifth Harmony may be reforming as a quartet, but that hasn't stopped the Internet from having a little fun with the group. Fans have spawned the hashtag #BeThe5thChallenge as a fun thought experiment for replacing former member Camila Cabello.

John Mayer got into the swing of things Tuesday night (Jan. 10), when he began a series of bizarre tweets that made fun of Twitter threads and quickly devolved from there.

He apologized to Fifth Harmony Wednesday morning, explaining, "I wrote a tweet last night, put 1/25 as a joke, and then it became a creative writing challenge. Thanks for being good sports. :heart: � no. 6."

Fifth Harmony was quick to retweet a picture of him as the newest fifth member. Read more here.