Rapper Psy's mega-hit "Gangnam Style" has jumped to second place on the Billboard Hot 100. "Gangnam Style" entered the chart two weeks ago at 64, and has been going strong ever since.

While Maroon 5's "One More Night" remains at number one for the second straight week, music watchers say Psy's viral hit could reach the top in the coming weeks.

The music video, featuring Psy's hilarious horse-riding dance, has been viewed over 280 million times on YouTube since it was uploaded in mid-July.