|Trotten pen 45, Bailey 72, Morison 75||Venue: The Den
GOALS from Liam Trotter, Nicky Bailey and Steve Morison handed Steve Lomas his first league win in charge over league-leaders Blackpool.
Millwall fell behind when Tom Ince drilled home from 20 yards but Trotter cancelled that goal out with a well-taken penalty on the stroke of half time.
Bailey edged the Lions in front when he volleyed in from a corner and Morison made sure of the win with a thumping finish three minutes later.
Lomas made six changes from the 5-1 defeat to Derby County, with Alan Dunne, Paul Robinson, Trotter, Jimmy Abdou, Scott Malone all starting.
Andy Keogh, Danny Shittu and Shaun Derry were dropped from the squad altogether, while Morison returned to the bench after a hernia injury.
Visiting 'keeper Matt Gilks was forced to make the first save of the evening when he parried Waghorn's long-range piledriver behind for a corner.
Waghorn had an even better chance to break the deadlock in the 14th minute when he pounced on Mark Beevers' knock down in the area, only to stab the ball straight at Gilks.
Blackpool took the lead against the run of play 90 seconds later when Beevers' poor header fell to Ince on the edge of the area and he drove the ball home through a crowd of players.
Millwall thought they had come up with an instant equaliser when, on their next attack, Martyn Woolford's header smacked the inside of the post and deflected clear via a touch off Gilks, who was rooted to the spot.
Despite falling behind, the Lions remained the better side despite but were reminded of the Tangerines' threat on the break when an incisive counter attack ended with Ince curling wide.
But Lomas' side hauled themselves level on the stroke of half time from the penalty spot. Isaiah Osbourne was penalised for handball in the midst of a goalmouth scramble and Trotter sent Gilks the wrong way from 12 yards.
In the 49th minute, Beevers found himself unmarked in the area but headed well over from Woolford's corner.
Millwall carved out another opportunity from another Woolford corner shortly afterwards, but Trotter mistimed his effort and the ball went harmlessly wide.
But the Lions finally made the most of one of Woolford's set pieces in the 72nd minute when Bailey arrived late to steer home a first-time volley.
Celebrations had barely died down when Morison held off his marker and slammed an unstoppable drive into the top corner to make it 3-1 just moments later.
Substitute Richard Chaplow could have added a fourth goal in the dying stages when he got on the end of Malone's low cross, but his shot was blocked.