Well, it seems this big sis wasn't having any of it!
Koko took to Twitter on Monday with a very cryptic message about all the "sh*t", writing:
[Image via Instagram.]
This is honestly both AH-Mazing and terrifying.
The blonde beauty not only snuck into Mr. Kimmel's home at 1:46 a.m., but Brit also LOUDLY blasted her new single Make Me as she and her backup dancers grinded about the comedian's bedroom. LOLz!
Make sure you catch Jimmy Kimmel Live! when it airs weeknights at 11:35 p.m. EST on ABC!