News Watch Ariana Grande Kiss Her 'Victorious' Costar Liz Gillies By Jackie Willis 12:50 PM PDT, October 6, 2015 Now Playing hh:mm:ss Ariana Grande gets pretty giddy in one of her latest Instagram videos.The "Problem" singer was hanging out with her former Victorious costar, Liz Gillies, when the two decided to share a silly smooch. The kiss led Grande to immediately squeal with laughter. WATCH: Ariana Grande Makes TV Apology for Donut-Licking Fiasco -- 'My Behavior Was Very Offensive'"My favorite video of all time @lizgillz," the 22-year-old pop star Instagrammed. "P.S. This was totally posted by accident." View this post on Instagrammy favorite video of all time @lizgillz. (p.s. this was totally posted by accident 🙈🙈😂😂)A post shared by Ariana Grande (@arianagrande) on Oct 5, 2015 at 10:28pm PDTOn Tuesday, Grande took to Twitter to further explain how she accidentally posted the video. MORE: EXCLUSIVE! Ariana Grande Confesses Her Celebrity Crush"I WAS EDITING IT IN INSTA TO SEND TO HER AND IT POSTED ACCIDENTALLY BUT ITS GREAT SO WHATEVER," she tweeted. "HAHHAHAHA @LIZGILLIES OOPS."HAHHAHAHA @LIZGILLIES OOPS— Ariana Grande (@ArianaGrande) October 6, 2015While Grande and Gillies had a mini Victorious reunion of their own, the former show's star, Victoria Justice, wasn't so sure about reuniting with her former Disney costar."I think we're kind of both on our own separate paths right now," Justice responded when asked by ET if she'd ever work with Grande again. "I've been more focused on acting and she's doing her singing thing and doing awesome." WATCH: Ariana Grande Ditches Her Signature Ponytail! Would you like to see a full-on Victorious reunion?Victoria Justice on Working with Ariana Grande Again: 'I Think We're Both Kind Of On Our Own Separate Paths'