Stop Scaring Your Sister, La Loca!

Was one of LOLhan‘s New Year’s resolutions (besides “positive-LOHAN MAYHEM!!!!!!!!“) to terrorize her lil’ sis??

Lohan took Ali out for a spin on a jet ski while vacationing in St. Barth on Friday, and we think Ali’s face says it all.

We wouldn’t trust La Loca behind the wheel either!

[Image via Ramey Pix.]