Number one US songs in January, 2011

What songs were number one in January, 2011? There were 5 USA #1 songs in January, 2011.

These number one songs in January, 2011 began with Firework by Katy Perry which went to #1 on 18th December, 2010 and remained at the top spot for 3 weeks.

The last number one song of 2011 was Hold It Against Me by Britney Spears which went to #1 on 29th January, 2011 and remained at the top spot for 1 weeks.

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