From the moment when Lay Lay jumped out of Sadie's personal affirmation app, to the girls' first musical performance with Young Dylan-- and who could forget hilarious adventures like the prank war, the Burger Games, and more-- check out our complete timeline of That Girl Lay Lay and Sadie's friendship! #ThatGirlLayLay #Friendship #BFFs #RelationshipTimeline ►► Subscribe for More: at.nick.com/Subscribe ►► Watch More from Nick: at.nick.com/NewNickVideos ►► SpongeBob on YouTube: at.nick.com/SpongeBobOfficial ►► NickRewind on YouTube: at.nick.com/NickRewind ►► All That on YouTube: at.nick.com/AllThat ►► What’s On TV? : at.nick.com/TVSchedule Catch More on Nick! GET MORE NICKELODEON: Like Nick: at.nick.com/Facebook Follow Nick: at.nick.com/Twitter Nick Instagram: at.nick.com/NickIG Like SpongeBob: at.nick.com/SpongeBobFacebook Follow SpongeBob: at.nick.com/SpongeBobTwitter SpongeBob Instag...