Lennon confirmed on Friday that the Scottish champions had rejected an offer, reported to be about £5 million, from Norwich for the 24-year-old English striker. Hooper got the Hoops off to a fast start when he slid in an Adam Matthews cross in the second minute for his 19th goal of the season.
Georgios Samaras added a second 10 minutes later but after Jason Holt pulled a goal back in the 68th minute there was a nervy spell for the home side which only ended five minutes from time when Hooper grabbed a third, before substitute Lassad Nouioui completed the scoring.
Before the game started there was a minute's applause in memory of Sean Fallon, the former Celtic player and assistant manager, who died on Friday, aged 90.
The home fans were still remembering the Parkhead legend when Celtic took the lead. Right-back Matthews raced up the wing and got the break of the ball as he attempted a one-two before driving into the box and squaring for Hooper to slide in from a couple of yards out.
The Tynecastle side looked all over the place and there was no surprise when Celtic doubled their lead 10 minutes later. Again, the danger came down the Jambos' left-hand side. Midfielder Kris Commons pushed his way past Kevin McHattie and turned Danny Wilson before his shot was parried by keeper Jamie MacDonald out to Samaras who tapped into an empty net.
Hooper then forced his way past the Hearts defence only to be thwarted by MacDonald with Joe Ledley's shot from the rebound blocked by Andy Webster.
Jamie Walker replaced Callum Paterson for the start of the second half and within five minutes he had tested Lukasz Zaluska with a low drive after skipping through the Celtic defence. Seconds later Hooper had the ball in the net from a Commons cross but was ruled offside.
The visitors found themselves back in the game when Holt burst through the middle and unleashed a drive which deflected off Mikael Lustig and spun past Zaluska.
A game that had been a stroll for the home side took on an edge but in the 85th minute, following determined work by Scott Brown, the ball fell to Hooper and he slammed it low past MacDonald. Lassad made it four as the game nudged into added time when he converted a cross from Emilio Izaguirre.
Elsewhere, Leigh Griffiths' goal earned Hibernian a point in a 1-1 draw against SPL strugglers Dundee.
John Baird gave the visitors - 13 points adrift at the foot of the table - an eighth-minute lead at Easter Road.
However Griffiths netted four minutes into the second half to earn Pat Fenlon's men a point.
Dundee United showed no ill effects from news of manager Peter Houston's planned departure as Johnny Russell struck a hat-trick to secure a deserved 3-2 victory at Kilmarnock.
Manuel Pascali gave Kilmarnock the lead against the run of play but Russell rewarded United's first-half dominance with an excellent finish two minutes before the break.
The goal originated from Keith Watson and Russell headed United in front from the same source before completing his treble two minutes from time to move his side above Kilmarnock into seventh place in the SPL table. Pascali headed a second goal in the final seconds but there was no time to push for an equaliser.
Billy McKay's double helped Inverness cruise to a 3-0 victory against Aberdeen.
Andrew Shinnie opened the scoring for the hosts nine minutes into the second half and McKay wrapped up victory with goals in the 61st and 78th minutes.
Inverness manager Terry Butcher enjoyed some cheers from the home fans who showed appreciation for him turning down the chance to move to Championship side Barnsley earlier this month. His commitment to the Highlanders came as his men extended their unbeaten run to 10 games in all competitions.
In the early kick-off match Ross County moved 12 points clear of danger at the foot of the SPL with an impressive 4-1 victory over St Mirren.
Richard Brittain fired the visitors ahead with an excellent 25-yard free-kick and the Highland side passed up numerous opportunities to extend their advantage during the first half.
St Mirren were rewarded for a bright start to the second half when Steven Thompson rocketed a shot past Mark Brown from just inside the area, but it was to be the highlight of the afternoon for Danny Lennon's side.
Sam Morrow took advantage on a horrific defensive error by David Barron to restore County's lead and Ivan Sproule marked his debut with a goal four minutes later.
Sproule capped off an excellent display when he tapped home a fourth and a miserable day for St Mirren was completed when Lewis Guy's penalty was saved by Brown in injury time.