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50 Photos That Prove Dave Grohl Is Everyone's Best Friend

2008 Clive Davis Pre-GRAMMY Party - Reception and Dinner

The 55th Annual GRAMMY Awards - Backstage And Audience

20th Annual Elton John AIDS Foundation Academy Awards Viewing Party - Inside

SiriusXM's "Town Hall" With Chelsea Handler Hosted By Dave Grohl On SiriusXM's Entertainment Weekly Radio Channel

11th Annual Chrysalis Butterfly Ball - Inside

The 55th Annual GRAMMY Awards - Pre-GRAMMY Gala And Salute To Industry Icons Honoring L.A. Reid - Backstage

The 2003 Billboard Music Awards - Backstage and Audience

2013 Film Independent Spirit Awards - Backstage And Audience

1993 MTV Video Music Awards

65th Annual Directors Guild Of America Awards - Cocktail Reception

Foo Fighters Visit fuse Studio

Invictus Games Closing Ceremony

The 54th Annual GRAMMY Awards - Backstage And Audience

2013 Film Independent Spirit Awards - Backstage And Audience

CIROC Vodka At 20th Annual Elton John AIDS Foundation Academy Awards Viewing Party

25th Film Independent Spirit Awards - Backstage & Audience

2013 Film Independent Spirit Awards - Backstage And Audience

The 46th Annual GRAMMY Awards - Backstage and Audience

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MTV's New Year's Pajama Party 2003 - Show

21st Annual Elton John AIDS Foundation Academy Awards Viewing Party - Inside

2013 American Music Awards - Show

2006 VH1 Rock Honors - Backstage

The 46th Annual GRAMMY Awards - Backstage and Audience

The 55th Annual GRAMMY Awards - Pre-GRAMMY Gala And Salute To Industry Icons Honoring L.A. Reid - Backstage

1993 MTV Video Music Awards

KROQ Almost Acoustic Christmas 2006 - Night 1 - Backstage

The 55th Annual GRAMMY Awards - Backstage And Audience

HBO, Starbucks and Chase Present "The Concert For Valor" - Backstage

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20th Annual Elton John AIDS Foundation Academy Awards Viewing Party - Inside

2005 MTV European Music Awards Lisbon - Backstage

The 55th Annual GRAMMY Awards - Backstage And Audience

21st Annual Elton John AIDS Foundation Academy Awards Viewing Party - Inside

Variety Studio At 2013 Sundance Film Festival - Day 4 - Park City 2013

2013 American Music Awards - Backstage And Audience

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KROQ Almost Acoustic Christmas 2006 - Night 1 - Backstage

2008 Clive Davis Pre-GRAMMY Party - Arrivals

12-12-12 Concert Benefiting The Robin Hood Relief Fund To Aid The victims Of Hurricane Sandy - Backstage And Audience

11th Annual Chrysalis Butterfly Ball - Inside

The 2012 MusiCares Person Of The Year Gala Honoring Paul McCartney - Backstage And Audience

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2007 MTV Europe Music Awards - Show

The 53rd Annual GRAMMY Awards - Salute To Icons Honoring David Geffen - Red Carpet

The 45th Annual GRAMMY Awards - Audience and Backstage

PANDORA Jewelry And Moto X Present 'American Hustle' At cinema prive

Dave Grohl is a people person. If he's not playing shows with the Foo Fighters, he's taking selfies with Lance Bass and cracking jokes with Michael Cera. If he needs a new iPhone, he calls Apple CEO Tim Cook right before getting ready for the Grammys with John Mayer. Dave Grohl is everyone's best friend, and we have the photos to prove it. From Rihanna to Paul McCartney, Taylor Swift to RuPaul, and even Barry Manilow—we're celebrating Dave's birthday by rounding up our favorite pics with his best celebrity buddies. Brace yourselves, because the dude seriously knows everybody.

In a vintage interview with the Foo Fighters and Matt Pinfield, Grohl's geeky and playful personality explodes as the boys talk about Cream and other classic rock bands.  It's moments like:

and:

that explain why everyone loves him.

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[Photo: Getty Images]