Lance Bass and Joey Fatone sit down with ET's Emily Curl to put their decades-long friendship to the test in this Sip or Spill. The guys opt to spill lots of truths, from ranking the vocal abilities of their fellow *NSYNC members to Joey revealing he loves singing Backstreet Boys songs! As for sips? The duo will be doing plenty of that on their new mixology competition series, 'Cocktail Wars,' airing Tuesdays  at 10 p.m. ET/PT on E! More from Entertainment Tonight: https://www.youtube.com/channel/UCdtXPiqI2cLorKaPrfpKc4g?sub_confirmation=1 Exclusives from #EntertainmentTonight :
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