On 2012’s KMF Live, 2NE1 and Lee Hi performed a mashup of their songs “1, 2, 3, 4” and “I Love you”.
2NE1 sang the beginning of Lee Hi’s song and the end of theirs, while Lee Hi sang the end of her song and the beginning of theirs. CL also did a original rap verse in the beginning of 1, 2, 3, 4. This version of both songs was performed specially live and there’s not a studio recording of it.