The Jonas Brothers load up on athletic gear at Big 5 Sporting Goods. - Clint Brewer/Splash News
The guys were spotted shopping at Big 5 Sporting Goods earlier in the week loading up on athletic gear for the event, which is a good thing since it's probably not exactly easy to run the bases in the tight skinny jeans the Jonas Brothers typically wear!
So how much do you think this birthday bash cost? According to reports, upwards of $30,000. Just renting the field alone starts at around $25 grand! And since the guys were playing at night, they needed to pay an extra $5,000 to have the stadium lights turned on. If they wanted to eat, food and drinks ran them $500, and if they wanted to pump their own music through the speakers that would have cost them another $500.
If we're lucky, maybe we'll see the soiree on an episode of MTV's "My Super Sweet 16"!