Infinity on High with a 54% decline during a post-Grammy week. The album rose to number three in its third week with 79,000 units sold. In its fourth week, the disc slipped to number four and sold 67,000 copies. "Infinity on High"s sales again fell in its fifth week, moving 58,000 copies and descending to number eight on the chart. In its sixth and last week in the top ten it fell to number nine and sold 43,000 copies. In April 2007, the album was certified Platinum by the Recording Industry Association of America (RIAA), denoting the shipment of one million copies. It
Infinity on High and all reaching international charts. "Infinity on High" was spurred on by the lead single "This Ain't a Scene, It's an Arms Race", which became the highest charting song for band and their first to chart worldwide. Wentz commented on the band's decision to pick "This Ain't a Scene..." as the first single, saying "There may be other songs on the record that would be bigger radio hits, but this one had the right message." It was sent to radio weeks before its digital release in January 2007; upon digital release the track debuted and peaked at number two on