I have seen part of the Sleep episode including the Lullaby by the great Mark Kozelek of Sun Kil Moon ( also certainly not on Nick's radar, but on the show nonetheless.) However I was channel surfing and didn't stick around long. * ouch *

I see enough documentation online from IMDB ⚠️ ↗ to Boing Boing ⚠️ ↗.

I also found a Smoosh fan page with numerous YouTube links including the Pajama Party song. And just as Boing Boing suggested the vid which was posted in 2007 had been taken down at the request of Viacom.

So your proof requirement will not be forthcoming.

However your notions about Nickelodeon having a monolithic identity fly in the face of 2 different brands ( Yo Gabba Gabba is Nick Jr. and not the TeenNick which produces any of the other series or specials you cite ) and of individual series producers with differing aesthetics. Ferinstance, I could logically refute Lazy Town since Nickelodeon has never aired another Icelandic series.

Like Lazy Town, Yo Gabba Gabba is sui generis; unlike yet another Dora knockoff. I for one will be more attentive the next time the "Sleep" episode airs.

Hey, we can both check it out this Friday when its scheduled to be rebroadcast in North America :)

Dante