Jennifer Lopez gifts Casper Smart a truck for 25th birthday

Her love may not cost a thing, but his seems like it's pretty damn expensive. Casper Smart, the dancer turned Jennifer Lopez beau feted his 25th b-day Friday with a low-key dinner and scored a gift that's, well, not so low-key.

"Jennifer had planned a fun day to celebrate [Casper]" a source told People. So the festivities began with a four-wheeled present: a customized white Dodge Ram truck." Lopez, 42, "knew Casper really wanted a truck, and [he] was very excited about the generous gift," said the source.

We're sure he was.

At least he'll have something to remember J. Lo by when - um, if - he goes the way of Cris Judd, J.Lo's second hubby, also a former backup dancer. 

Follow Style/Buzz/Special Sections Editor Perrie Samotin on Twitter: @PerrieWS