The MP3 album deal of the day over at Amazon today is Foo Fighters Greatest Hits for only $3.99.

Note, this deal is only for today, Friday, April 1, 2011, until midnight PST.

This 17-song collection from Foo Fighters features an exclusive track, a cover of Pink Floyd’s “Have a Cigar,” not sold anywhere else.

The album contains hits like “Everlong,” “Learn To Fly,” “My Hero,” “Monkey Wrench,” and “Breakout.”

Math time: The songs on this album typically sell for $.99 – $1.29 each and I just named five songs worth having, which right there justifies the cost. If you’re already a fan of the Foo Fighters, then this is a great chance to grab this collection for a severely discounted price and also get the exclusive track; if you’re not familiar with the band, which is fronted by former Nirvana drummer Dave Grohl, then this is the perfect opportunity to check them out.

Note, if you purchase MP3s through Amazon, you can save them to Amazon’s new Cloud Player and listen to the songs straight from their player; you also have the option to download the songs to your computer and put them into your iTunes library. There’s also an option to gift these MP3 purchases to others – just click the “Give album or song as gift” button on the right on the product page.