When Courtney snuck back onto the island and made out with Gwen? It was in Courtney's exclusive clip for Total Drama All-Stars. She ran into Gwen and apologized with tears in her eyes, begging for forgiveness. Gwen accepted Courtney's apology and Courtney planted a kiss on Gwen.
No? How about that time when Ezekiel and Staci shared an intimate moment in the Lame-o-Sine?