(SPOILER)You mean AP, right? You earn AP, not EXP. With that in mind you can not only gain AP but even score an Overkill bonus as Shooting Star also does damage at the same time.

[time for lame joke]Wait, wait, is "XP" a portmanteau of "Extra" and "AP"? Because then technically yes, you can get extra AP but you've gotta deal damage equal to or above that enemy's Overkill level.[/time for lame joke]