Watch Giselle, Evangeline, and Mercedes take on the speech jam challenge and put their own spin on Nickelodeon theme songs and tongue twisters!   Which sister do you think did the best? Let us know in the comments and make sure to catch more SpongeBob SquarePants and The Loud House on Nick! ►► 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! #GEMSisters #SpeechJamChallenge #Nick GET MORE NICKELODEON: Like Nick: at.nick.com/Facebook Follow Nick: at.nick.com/Twitter Nick Instagram: at.nick.com/NickIG Nick Snapchat: at.nick.com/NickSnapchat Like SpongeBob: at.nick.com/SpongeBobFacebook Follow SpongeBob: at.nick.com/SpongeBobTwitte...