Start Something is the second studio album by the Welsh rock band Lostprophets, released on 2 February 2004 through Visible Noise in the United Kingdom and South Korea. The album was released internationally on 5 February 2004. The band began work on the album in 2003 after touring for support of their previous album, The Fake Sound of Progress. This is the second and last album featuring the original drummer Mike Chiplin.
 
Start Something was a critical and commercial success and became the band's international breakthrough album. It peaked at number 33 on the Billboard 200 selling over 500 thousand copies in the United States alone and reached high positions on charts worldwide. Six singles were released from the album: "Burn Burn", "Last Train Home", "Wake Up (Make a Move)", "Last Summer", "Goodbye Tonight" and the radio single "I Don't Know". These singles helped Lostprophets reach mainstream popularity. In 2004, the album was certified platinum by the BPI in the United Kingdom, and gold by the RIAA.
 
The album was met with much attention in the UK and the US, thanks to the three first singles from the album: "Burn Burn", "Last Train Home" and "Wake Up (Make a Move)", which all met with high chart positions in the UK, US and in mainland Europe. The album was certified Silver and Gold by the BPI on 20 February 2004 and certified Platinum on 14 January 2005. According to the Recording Industry Association of America (RIAA), the album has sold more than 500,000 copies in the United States, earning a Gold certification. The album has sold 2.5 million copies worldwide according to the British Broadcasting Corporation (BBC).
In the mids of February 2004, Start Something reached its peak at #33 on the Billboard 200 which was the band's highest charting position in the United States at the time. The album also reached #33 on the Billboard Comprehensive Albums chart in the United States. The album first charted on the UK Albums Chart at #4 in 2004, in 2005 it peaked at its peak position #93 and after the release of Liberation Transmission in 2006 the album re-charted and peaked at #133.