The number one song on January 1, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 19, 2012 was "We Found Love" by Rihanna.
The number one song on January 18, 2012 was "We Found Love" by Rihanna.
The number one song on January 2, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 3, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 4, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 5, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 6, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 7, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 9, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 11, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 12, 2012 was "Sexy and I Know It" by LMFAO.
The number one song on January 13, 2012 was "Sexy and I Know It" by LMFAO.