Another background tidbit

So I'm watching the west coast version of the 30 Rock live episode... they are nailing it! But I noticed this background tidbit I had to share with you guys, mostly because I don't know why it's there...

In this scene, when Jack is sniffing paint:

See something on a paint can near the center of the screen? Let's zoom in...

Why is "Glee" written on a paint can? Any theories? It's not like its Glee's paint, because they're on different networks. At first I thought it was a jab at Glee because the label underneath said "Gross paints," but it definitely says "Gloss."

Any theories?