Manu Tuilagi struck twice for the Tigers as they moved seven points clear of reigning English champions Harlequins in second place in the Aviva Premiership as they picked up a priceless bonus point on the road.
"It's like Groundhog Day every time we get to this stage of the season. It happens every time, every year," said Youngs.
"We just have to keep winning. We have big game after big game, and that is good because you cannot take your foot off the gas."
By their own admission, Tigers will head to Toulon as underdogs, but not afraid of anything they may face. Victory at Northampton made it three wins in a row in March, but a fourth successive triumph in Toulon would be the biggest of the season.
"We have been desperate to hit a bit of form and today we actually put in a performance that was worthy of the lads," said Tigers director of rugby Richard Cockerill at the weekend.
"We haven't been on poor form, but we just needed things to click. Saints have been in good form, but I think we proved our class."