Live music site Songkick has raised $1.9 million of a $2 million funding round, according to a new SEC filing. The funding was confirmed to Billboard by CEO and co-founder Ian Hogarth. He would not specify the source of the funding but told Billboard the company has not recently added any new directors to its board.

The London-based company could use more staff to handle its rapid growth. Hogarth tells us that Songkick's traffic increased five-fold in 2010 and growth in 2011 has been "explosive." According to Alexa, Songkick.com has a traffic rank of #8,644 and a U.S. traffic rank of #2,797. As a point of comparison, LiveNation.com has an Alexa traffic rank of #8,085 and a U.S. traffic rank of #1,681.

Launched in 2007, Songkick allows users to track their favorite artists and find out about local concerts. It first landed a $15,000 investment from Y Combinator. It later received investments from SoftTech VC, The Accelerator Group and Index Ventures. It has grown its traffic in part with partnerships with leading websites. For example, YouTube has integrated Songkick's concert listings into its music page and Yahoo! adds them to its search results. It currently indexes 133 different ticket vendors, venue websites and local newspapers to create its music database, according to the company's website.