>>> ON A SINGLE DAY IN 2008, 3 OF THE BIGGEST POP SONGS OF ALL TIME WERE RECORDED AT INTERSCOPE STUDIOS. AND THE NEVER-BEFORE-SEEN FOOTAGE FROM THE SESSION IS FINALLY BEING RELEASED. >> THE LABEL IS SO EXCITED ABOUT THE RECORD. WE CAN'T WAIT TO WORK ON THIS NEW SINGLE WITH Y'ALL. >> YEAH, WE KNOW IT'S A WORK IN PROGRESS, BUT LET'S HEAR WHAT YOU GOT SO FAR. >> OKAY. HIT THE TRACK. ♪ GOTTA GET THAT ♪ ♪ GOTTA GET THAT ♪ ♪ GOTTA GET THAT THAT THAT THAT THAT ♪ ♪ BOOM BOOM BOOM ♪ ♪ GOTTA GET THAT ♪ ♪ BOOM BOOM BOOM ♪ ♪ GOTTA GET THAT ♪ ♪ BOOM BOOM BOOM ♪ >> UM, YEAH, THAT'S ALL WE GOT SO FAR. >> WOW. WILLIAM, THAT'S A REALLY GOOD START. >> IT'S WILL.I.AM. AND I KNOW. >> I LOVE -- I LOVE HOW IT'S SOUNDING. BUT I THINK WE MIGHT HAVE TO CHANGE THE LYRICS A LITTLE? >> WHAT YOU MEAN? THE LYRICS ARE -- ♪ BOOM BOOM BOOM ♪ I MEAN, WHY WOULD WE CHANGE THAT? >> UGH. PRODUCERS ARE LIKE LEECHES, AND ART IS BLOOD TO THEM. >> WELL, THOSE WERE ACTUALLY THE TEMP LYRICS WE SENT TO DESCRIBE THE BEAT OF THE TRACK. >> YEAH, YOU WERE SUPPOSED TO REPLACE THEM WITH YOUR OWN LYRICS. YOU KNOW, LIKE, WITH WORDS? >> PRODUCERS ARE LIKE LEECHES. >> NO ONE UNDERSTANDS OUR VISION. ♪ BOOM BOOM BOOM ♪ IT'S PERFECT, I'M FREAKING OUT! >> HOW ABOUT SOMETHING LIKE -- ♪ I GOT THAT BOOM BOOM POW ♪ >> OKAY. THAT'S KIND OF CLOSER. UH, WHAT'S YOUR NAME AGAIN? >> APL.DE.AP. >> OF -- OF COURSE. AND HOW DO YOU SPELL THAT? >> A-P-L -- APL.DE.AP. >> OKAY. UH, SO, WE DEFINITELY HAVE "BOOM, BOOM, BOOM." UM, BUT LET'S EXPAND, RIGHT? LIKE, WHAT'S SOMETHING WE HAVE TO GET? >> LIKE, FOR EXAMPLE, MONEY OR HOT GIRLS? ♪ GOTTA GET THAT ♪ >> OKAY. "YOU GOTTA GET THAT" WHAT, THOUGH? ♪ GOTTA GET THAT THAT THAT ♪ >> YOU'RE SUFFOCATING ME! >> TABOO, RELAX. LET'S THINK. WHERE WOULD THIS SONG BE PLAYING? MAYBE A NIGHT CLUB, OR A FULL SIZE BAR. >> OOH, OKAY. I'M GOING TO RIFF ON THAT IDEAS. HOW ABOUT SOMETHING LIKE -- ♪ PEOPLE IN THE PLACE ♪ >> OKAY, FERGIE, UH, THAT'S A GREAT START. BUT WHERE WOULD THEY ACTUALLY BE? ♪ THE PLACE ♪ >> OKAY. AND -- AND WHO WOULD BE THERE? ♪ THE PEOPLE ♪ >> UH-HUH. BUT WHERE IS IT THEY WOULD BE GOING? ♪ TO THE PLACE ♪ >> OKAY. AND WHERE ARE THEY NOW? ♪ IN THE PLACE ♪ >> BUT WHO ARE YOU TALKING ABOUT? ♪ THE PEOPLE IN THE PLACE ♪ >> LET'S MOVE ON. >> THAT WAS AMAZING, FERGIE, I'M FREAKING OUT! >> AND I'M APL.DE.AP. >> WHY DON'T WE TALK ABOUT YOUR VERSE? I WAS THINKING IT WOULD BE COOL IF IT WAS LIKE -- ♪ I GOT THAT BOOM BOOM POW ♪ ♪ THEM CHICKENS JACKING MY STYLE ♪ ♪ THEY TRY TO COPY MY SWAGGER ♪ ♪ I'M ON THAT NEXT -- NOW ♪ ♪ I'M SO 2008 YOU SO 2000 AND LATE ♪ >> YES. YOU KNOW WHAT? THAT'S AMAZING. BUT I WANT IT TO BE "3008." >> OKAY. WHY? >> 'CAUSE IT'S BIGGER. >> FINE. UH, DO YOU HAVE ANY OTHER NOTES? >> MY HUMPS! >> OKAY! THANK YOU, FERGIE. >> YEAH, WELL, LET'S JUST DO THE NEXT TRACK. HERE'S WHAT IT SOUNDS LIKE SO FAR. ♪♪ YEAH, SO, WE WANT THE LYRICS TO BE ABOUT THE CONCEPT OF "TONIGHT." >> LET'S START BY BRAINSTORMING ANSWERS TO THE QUESTION, "HOW IS TONIGHT GONNA BE?" >> I'M THINKING -- I'M THINKING SOMETHING LIKE -- ♪ TONIGHT'S GONNA BE A GOOD NIGHT ♪ >> THAT'S AMAZING WILL.I.AM. >> OKAY. UH, ANYONE ELSE? ♪ GOTTA GET THAT THAT THAT ♪ >> OH, I'M FREAKING OUT! >> ALL RIGHT. ALL RIGHT, TABOO, IT'S OKAY. UH, BUT WE ACTUALLY ALREADY HAVE THAT. >> MAZEL TOV! >> YES! WE'RE GETTING SOMEWHERE. NOW I'M GONNA GO DOWN THE LINE. EVERYONE JUST SAY ONE EXAMPLE OF SOMETHING YOU'RE GONNA DO TONIGHT. ARE YOU READY? ♪ LET'S DO IT ♪ ♪ LET'S DO IT ♪ ♪ LET'S DO IT ♪ ♪ LET'S DO IT ♪ ♪ AND DO IT ♪ ♪ AND DO IT ♪ ♪ AND DO IT ♪ ♪ AND DO IT ♪ ♪ LET'S DO IT ♪ ♪ LET'S DO IT ♪ ♪ LET'S DO IT ♪ ♪ AND DO IT ♪ >> OH, MY GOD, THIS IS GONNA BE A HIT. >> YEAH. YEP. AND -- AND NOW, BEFORE OUR SESSION IS OVER, LET'S GET TO THE SONG THAT YOU'LL BE MOST KNOWN FOR TO THE END OF TIME. >> YES. THE WORKING TITLE IS -- ♪ LET'S GET -- ♪ -- SOMETHING. UM, ANY IDEAS FOR WHAT IT COULD BE? >> HM. >> "LET'S GET" WHAT? OKAY. WELL, IT HAS TO BE SOMETHING THAT WE CAN SAY FOREVER. ♪♪ ♪♪ ♪ LET'S DO IT LET'S DO IT LET'S DO IT ♪ ♪ LET'S DO IT LET'S DO IT ♪