The girl was singing a live set on MTV U. She was younger, maybe like 19 or 20, and had natural red hair and freckles I think.
She sings two songs and I can only remember two of the lines.
The first song included the lyrics “And I (or you) say Yeah”. The second song included the lyrics “I just want to be wrong”, I think. This line was the last line of the song.
Her songs were super catchy and so I’m trying to figure out who it is. All I can find when I google all this is songs from the past. Since she was on MTV U (a live set), I imagine she is probably an artist who has come about in the last years or so.