We spotted the singer soaking up some sunshine in Mexico earlier this week in a flirty floral bikini, flaunting her sleek physique off-duty.
So how did she drop the pounds?
She's been spinning her wheels—literally!
A source tells E! that the singer had two bikes delivered to take with her on tour to keep up the intensity of her workouts, and we also know that she also held a private birthday party at the studio back in spring 2012.
Famed photographer Terry Richardson even posted a snapshot of the duo on their bikes on his blog to further prove their mutual fitness obsession.
From what we can tell, spinning does a body good!