Back in September, Pepsi invited music fans across the country to join in their effort to create an unique music collaboration for the "Ultimate Refresh" of the LMFAO hit single, "La La La".

Will.i.am, of Black Eyed Peas fame, joined the wild duo to produce a user-generated video and music track for sale in December.

So far, other artists have joined in, including Chester French, Far East Movement and Anjulie. Other artists getting involved for "refresh" collabs, which will come soon, include Wale, and Just Blaze.

Here's how it works: Pepsi's "Ultimate Refresh" is introducing a new, digital mixing player that creates video mash-ups by combining three original music clips, plus a performance by LMFAO, which is selected by the user, to produce a unique two minute collaborative video to be featured on the official website, UltimateRefresh.com.

Music lovers are encouraged to produce their own version of LMFAO's "La La La," showcasing one of four talents: vocals, melody, chords or percussion.

Videos uploaded on to UltimateRefresh.com will be reviewed by Will.i.am, who will produce a final song and video incorporating his favorite user-generated content into a remixed version of the hit single.

For more info, visit UltimateRefresh.com.

Below are some of the current "Refresh" artist remixes:

Far East Movement x Chester French x LMFAO

Far East Movement x LMFAO

Chester French x LMFAO

Anjulie x LMFAO