Have Fifth Harmony officially fallen out of tune, and are the ladies' days as a group numbered? Some 5H fanatics say recent developments point to an imminent breakup.

5H, whose third self-titled album dropped in 2017, announced Thursday (February 15) that they were canceling their forthcoming Australian tour, noting on ticketing site Ticketek: "TEG Live, the promoter of Fifth Harmony, has regretfully advised, due to necessary scheduling requirements, Fifth Harmony will be unable to proceed with their 2018 Australian Tour."

This, paired with Lauren Jauregui's slew of recent solo projects (Billboard claims she's switching labels to pursue additional one-woman projects), and Normani Kordei's new solo effort with Khalid has left the 5H fandom suddenly racked with doubt about the group's future.

Miss Movin' On: life imitating art?

"I’m preparing myself for the Fifth Harmony breakup. I’m sad cuz I know that s--- is coming," one fan tweeted, while another noted "omg what’s happening to fifth harmony this is really sad they really are gonna break up i’m so SAD."

All the while, erstwhile 5H member Camila Cabello is enjoying the success of a solo artist — her self-titled debut album rocketed to the top of the Billboard charts and was No. 1 on about 100 worldwide charts. And earlier this week, she announced her very first solo tour — the Never Be the Same Tour — which will kick off later this spring.

Former Group Members Who Went Solo:

More From MIX 108