We promise not to mention that Sean Lennon — the son of John Lennon and Yoko Ono — is one half of The Ghost of a Saber Tooth Tiger, aka The GOASTT. Dammit. Did we just mention that? Anyway, he and his other half, model-turned-musician Charlotte Kemp Muhl, also happen to be pretty good at the whole music thing. Check out their modernist take on ’60s psychedelia 8 p.m. Saturday at ACM@UCO Performance Lab, 329 E. Sheridan Ave. Tickets are $12. Call 974-4700 or visit acm.uco.edu.