On this day in 2009, Just Dance became Gaga's first #1 hit on BB Hot 100

[migamiga 12,067]

I never liked a song quicker than JD. That synth intro snatched me!!!

[AndyDWUW 3,971]

Half-psychotic sick hypnotic 

[Killa 14,409]

she's so mesmerizing, you can't take your eyes of her.