5 Seconds of Summer -- Calum Hood's Sticking and We're Down with the Wiggles! (Video)

[[tmz:video id="0_wndj84tn"]] 5 Seconds of Summer broke some big news to us about the band's future -- and no, we're not only talking about Calum Hood's rumored departure ... we're talking The Wiggles!! The guys were getting mobbed by fans at Lax on Monday when our photog, Charlie -- who's Australian like 5Sos -- popped a question about the true kings of the Down Under music scene. Yes, The Wiggles do kids music, but they've been at it for nearly 25 years!

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