Shrek 2 Easter Egg - Love Potion

When Fiona's father is looking at the "love potion" before putting it in her tea you get a brief look at the bottle, which is labeled "IX" or no. 9. If you've noticed the love of "oldies" by the creators, you'll realize that this is homage to a hit by The Clovers in 1959 called Love Potion no. 9.