Following "Tim McGraw", four further singles were released throughout 2007 and 2008: "Teardrops on My Guitar", "Our Song", "Picture to Burn" and "Should've Said No". All were highly successful on the Billboard Hot Country Songs chart, with "Our Song" and "Should've Said No" both reaching number one. "Our Song" made Swift the youngest person to single-handedly write and sing a number-one country song.[66] "Teardrops on My Guitar" became a minor pop hit; it reached number 13 on the Billboard Hot 100.[67] The album sold 39,000 copies during its first week of release[68] and, as of March 2011, had sold over 5.5 million copies worldwide.[69] Swift also released a holiday album, Sounds of the Season: The Taylor Swift Holiday Collection, in October 2007, and an EP, Beautiful Eyes, in July 2008.[70][71]