Miley Cyrus was photographed 'having a ball' jet skiing with really close friend Nick Jonas in Tybee Island [Savannah, Georgia], according to The Coastal Source. While the photo is far away the sight says they are searching closer for another photo. It does look like them. It looks like their sizes to.
In this photo you can see how much shorter Miley is compared to Nick and it's almost exact in the jet ski photo.