Big news in the Belgian daily De Standaard : everybody’s favorite all-american disfunctional youngster Bart Simpson turns out to be a Tintin fan. In the episode In the name of the grandfather, the Simpson family takes a trip through Europe, and is greatly impressed by the beauty of Ireland. “It’s whole lot prettier than Belgium”, Bart says. His mother, Marge berates him: ‘If you hate Belgium so much, then I might as well take away your Tintin albums. ” Bart looks terrified and clings his copy of The crab with the golden claws to his chest.  Neat !
Heh, yeah, I just saw this one a few days ago on TV here, made me giggle too, although I’d have figured Lisa more for reading Tintin and Asterix and the like than Bart
This is not the first Tintin reference on The Simpsons:
http://tintinmovie.org/2009/03/28/tintin-on-the-simpsons/