2009 Moment of Anime 5: Uncle Joe was right
For me, the ninth episode was the straw that broke the camel's back so this parody video utterly captured my feelings like nothing else could.
Even in the omake it's all about Ami

And she just stole my heart when ToraDora SOS opened straight to her sighing, clicking her tongue and complained about the amenities, or rather the lack thereof, of her last modelling shot.
Easily the funniest chara in the omake. All hail Gourmet ni Ami!
P.S. I wouldn't mind trying tarako spaghetti.
Sing till the dawn

I was LOL when Yuki took out the kiddie electronic keyboard with microphone. And when she started belting out 'Paradise Lost' against the simplified tune, I just lost it. Great seiyuu in-joke. And that Ga-Rei Zero OP song was my second favourite thing from the series. Other songs I'd love to hear on the Yuki Minfong Ho repetorie would be Junpaku Sanctuary, mokutt minami growing (LOL) and, of course, Yuki, Muon, Madobe nite. Suggestions for duet with Achakura?
But I was still surprised that a song from an anime by another studio (in this case, AIC Spirits & asread). Yeah I know KyoAni did that too for the Lucky Star EDs with the closed karaoke room door but I don't think those were recent anime. Paradise Lost was comparatively much more recent. Other animes, like Hayate no Gotoku, seem to take great pains only to sample its own music - minimize royalty payouts and maximize pimpage of own stuff?

