gnash and Olivia O'Brien perform their hit ‘I hate u, I love u’ on TODAY


At just 23 years old, Garrett Nash has released three Eps, and his most recent chart topping single, "I hate u, I love u," was recently certified platinum with more than 100 million views on YouTube. Now gnash, as he is also known, is gearing up for his tour, which kicks off next week. But first he’s joined by singer Olivia O’Brien to perform “I hate u, I love u” on TODAY.