OMG you guys, shocker -- Fergie is working out. As usual she is rocking hardcore with her hydration belt contraption [1] which, necessary or not, is definitely something won't work out without. Speaking of keeping things familiar, Fergie lent her voice to the Shrek the Third soundtrack, covering Heart's classic Barracuda, but keeping it kinda awkwardly exactly the same as the original. [2] The sincerest form of flattery?

[2]

Source [3]