Are Victoria and Ariana Feuding?

Victoria Justice and Ariana Grande used to be buds, but no more! Ariana recently posted online, "The only reason Victorious ended is because one girl didn't want to do it. She chose to do a solo tour instead of a cast tour." Victoria tweeted back, "Some people would throw someone they considered a friend under a bus just to make themselves look good. Stop being a phony." Ariana replied, "You can't hide from the truth." Ouch!