We know about his messy divorce, his public feud with the Black Keys and his strained relationship with former bandmate Meg White, but at least we now know there's one thing that isn't currently troubling the easily troubled Jack White.

During a performance of the White Stripes' 'Icky Thump' at this past weekend's Forecastle Festival in Louisville, Kentucky, White broke out into Jay-Z's '99 Problems' before segueing into Dick Dale's 'Misirlou.'

These sorts of covers are nothing new for White, who has been working in nods to other artists during songs performed in support of 'Lazaretto.' He's recently played bits and pieces of songs by Metallica, the Stooges and Kanye West among others.

But maybe this was another attempt to grab the attention of Jay-Z, whom White said he attempted to collaborate with in the past.

Watch the fan shot video of '99 Problems' above, and skip to around 2:55 if a lack of free time is a problem of your own.

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