Which of these singles (both top 5 in the US) is the best for you ?
http://www.youtube.com/watch?v=-Edv8Onsrgg
Written and produced by Max Martin, Dr. Luke and Billboard, with additional writing by Bonnie McKee.
The song debuted at #1 in Belgium (Wallonia), Canada, Denmark, Finland and New Zealand, as well as on the US Billboard Hot 100, where it became her fourth chart topper. In the US, "Hold It Against Me" made Spears the second artist in Billboard 's history to debut at #1 more than once. "Hold It Against Me" was Spears's second consecutive single to debut at #1.
http://www.youtube.com/watch?v=lVhJ_A8XUgc
Written by Dr. Luke, Claude Kelly and Benny Blanco / Produced by Dr. Luke and Benny Blanco.
"Circus" reached #3 on the Billboard Hot 100 and #1 on Pop Songs and is her second best-selling digital song in the country, having sold over 3 million copies.