Easter egg: On the disc's main menu, wait for a couple of seconds. Kate's rump will appear and will do a stinky like her son (Stinky). Press your down button until you see PRRRP. Press your enter button to see a clip of Kate teaching you to spell the word "POOP" and some weird message that is saying stinky stuff. Whew. On the special features menu, go to the second page. Highlight the "Photo Gallery" menu entry and press your enter button to highlight S Club. Press your enter button to watch this.
Easter egg: Go to deleted/extended/alternate scenes. Go down to That's Hot and then click right to highlight bikini top to see a weird extra Harry Potter scene.