Get the Champagne out, boring, boring Chelsea are three points away from the Premier League title
A win on Sunday against Crystal Palace and the Blues will have the crown back in SW6 for the first time in five years.
Goals from Didier Drogba, John Terry and a thumper by Ramires sealed an emphatic win, that saw the Blues recover from an opening strike by Leicester City's Marc Albrighton.
While the second half was a vintage display, the first was lacklustre and lacking character.
Didier Drogba's half-hearted effort that inched past Kasper Schmeichel was the visitors' only worthwhile effort in the opening 45 minutes.
A long-range shot by Drinkwater on 38 minutes sailed high and wide of Petr Cech's goal.
A mad scramble five minutes from time almost saw the home side score three times, but desperate defending by Cech, Terry and Cahill thwarted the relegation-haunted side.
Right on half time, Leicester struck. Good work on the left saw the ball cut across goal, Azpilicueta slipped allowing Marc Albrighton to slot home past Cech, his first goal for Leicester.
Jose Mourinho made a tactical change which saw an immediate response.
Pushing Fabregas further forward, the Blues started the second half on the front foot and within three minutes had levelled the score.
Didier Drogba rolled back the years to slam home a low drive from an Ivanovic cutback to notch up his first goal in 20 appearances.
Fabregas had a great chance to score on 52 minutes ago a lung-busting run by Willian. The Brazil midfielder put in the perfect ball into the Leicester penalty area. In-running Fabregas, perhaps not expecting such quality was a fraction of a second late and the ball squirming away from him.
A cheeky curler from Willian on 64 minutes went high and wide of Schmeichel This was followed up by a speculative 20-garden by James.
While Chelsea dominated possession, City still had a threat went getting forward.
Eleven mo Utes from time, and the Blues took a deserved lead. Fantrgas sent a ross the perfect corner. Cahill nodded on, Schmeichel got a touch on it and captain marvel Terry stuck out his right foot and shinned the ball home from close range.
Victory was almost assured three minutes later when the Blues extended their lead through a blistering left-football drive from Ramires that flew into the top left-hand corner of the net.
Mourinho made a couple of substitutions to see out the final few minutes to secure the three points.
Teams: Chelsea: Cech; Ivanovic, Cahill, Terry (c), Azpilicueta; Ramires, Matic; Willian, Fabregas, Hazard; Drogba.
Subs: Courtois, Zouma, Filipe Luis, Ake, Mikel, Cuadrado, Oscar.
Leicester City: Schmeichel; Wasilewski, Huth, Morgan (c); Albrighton, King, Drinkwater, Cambiasso, Konchesky; Ulloa, Vardy.
Subs: Schwarzer, De Laet, Hammond, James, Mahrez, Wood, Kramaric.
Referee Mark Clattenburg.