Rodrigo catapulted to the top of the charts with the single earlier this year ... but just learned one of the harsh realities of driving in Los Angeles and just about every other big city -- no matter how hard you try -- eventually, you're gonna get hit with a parking violation.

While it's not clear just what Olivia was ticketed for -- in L.A. there's street sweeping, restricted zones, parking meters, parking passes, we could go on all day -- it appears Olivia is at least having some fun with it.

The singer posted a photo of her ticket with the caption, "Damn, this driving s**t ain't all fun and games." You're tellin' us!!!