Outspoken British singer Lily Allen has threatened to punch pop rival Paris Hilton on her upcoming promotional tour of America. Allen is keen to break the US market with new album ALRIGHT, STILL and is confident the record will beat one chart competitor at least. She says, "Paris is hideously untalented. I poured my heart into my album. She just got someone else to do it for her. "If she's rude to me I'll punch her."