When I watched one of the episodes of Blood+ and Solomon walked into the ballroom. It gave a great chock. Because he resembles Tamaki so much, that it feels kind of creepy and funny at the same time. XD
When Diva took up Riku's appearance, she looked just like Haruhi.
Note: When I drew Tamaki in the first panel, I refered to the manga. I got his hair all weird.
And another thing, I didn't reinked Diva's hair. Her hair looks weird because of the pencil shadings.
But I hope you get this short joke.