Beyonce‘s little sis Solange Knowles performed her new song “Sandcastle Disco” on The Late Show With David Letterman last night. As for knockin’ boots, we’re not sure who’s she’s dating — if anyone. After divorcing former football player Daniel Smith (now a wannabe rapper in Houston), rumors died down very quickly that she had hooked up with Lil Wayne last summer. Below, watch Solange’s new video. [Top photo: Splash News Online; bottom: Getty Images]
