Due to both of their rising popularity, the song has become Boys Like Girls' third, and second consecutive Top 40 single on the Billboard Hot 100. Also, it gave Swift her twenty-first Top 40 on that chart. For the chart week of January 9, 2010, the song became Boys Like Girls' first Top 20 single on the Billboard Hot 100, becoming their biggest hit single to date, and Swift's eleventh Top 20 single.
The single was sent to mainstream radio in the United States on October 19, 2009. "Two Is Better Than One" debuted at #92 on the Billboard Hot 100. It fell off the following week but re-entered at #79 and rose the following week to #64. It has since become Boys Like Girls' third Top 40 on the Hot 100 as well as Swift's twenty-first entry in the Top 40. It is also the group's biggest hit to date.
A music video for the song was made. Swift does not appear in the video, but her vocals are still heard. It was directed by Meiert Avis. The music video features Erik Huffman from Survivor: China and Mika Combs from The Amazing Race 15. The music video shows the story of the relationship between a couple (played by Huffman and Combs). A scene where the band performed in a hall was also shown, starting with Johnson playing a guitar alone before the rest of the band members walked in.
|Chart (2009–2010)|| Peak|
|Canadian Hot 100||18|
|U.S. Billboard Hot 100||18|
|U.S. Mainstream Top 40 (Pop Songs)||7|
|U.S. Adult Contemporary||29|