Twitter user Jon Nguyen (@JNDrama) wrote a fan account of what went wrong at T-ara N4's US debut at Las Vegas Palms Pool on May 26. Their label Core Contents Media also issued a response.Here's what CCM had to say (via AllKpop):"We're flustered as the label, as well. We think there was some mix up and it happened because the concept of the concert was different. It was something promised from the beginning while we were talking details on recording 'Countryside Life' with Chris Brown. Even the label won't know what really happened until after the American promotion team arrives on the evening of the 29th."We were told that they'd be opening for a concert, but it was actually more like a festival-type event. It's true that Chris Brown and Wiz Khalifa planned the concert. The video is of their first performance. In their second performance, we heard that Chris Brown came out to introduce T-ara to the crowd."Here's what the fan wrote:"I got there at 12 pm, where I found two other Queens waiting at the front of the stage. I joined them and we spotted T-ara several times in the crowd and in the VIP section. "After about 3 hours of waiting, Chris Brown finally appeared on the stage and performed his set. I am not sure where he went after his performance but it's possible that he left, the pool party. "After another hour of waiting, T-ara N4 appeared on stage and performed Countryside Life. Just as I feared, they received very mixed reactions from the crowd. We were the only ones who were really cheering them on and it was extremely awkward. "Most people were just silent and confused. Some girls in the crowd even told them to get off the stage. It was totally the wrong crowd for them to perform for. The hardcore partying and hip hop crowd there did not expect to see an unknown (in America) girl group show up randomly and perform a song in Korean. "Chris Brown didn't even show up to perform his part. The DJ cut them off abruptly, which angered T-ara, especially Eunjung, but they were allowed to finish their performance after that awkward moment. "At the end of the performance, Eunjung reached out and grabbed our hands because we were the only Queens there to support them. After their performance, they regrouped at an area by the pool where they appeared to be really embarassed and upset (yes, there was some crying). "That was when I approached Jiyeon and asked her to sign my shirt again, took a picture with Eunjung and had the opportunity to speak with Dani, where she told me how upset they were. "The DJ later apologized and they were allowed back on stage to, perform again, where the crowd was a little bit more supportive, but it was still really awkward. "Their mood did not change after the second performance. They still seemed embarassed and upset and they quickly retreated to a private room. That was the last I saw of them."