Despite, topping the standings at the end of October, the Blues suffered a massive dip in form, which eventually cost popular manager Roberto Di Matteo his job at Stamford Bridge.
Former Liverpool boss Rafa Benitez was appointed to the role until the end of the season and, after a stuttering start under the Spaniard, the Londoners are now flying, winning seven of their last eight, to move themselves back into contention for the Premier League outright.
While it previously appeared that Manchester United and Manchester City were the only two contenders for the title, Chelsea are now well and truly in the race and punters may decide to use their free bet to back them to continue their run by beating QPR on Wednesday.
Lampard, who is currently in the final few months of his contract at the club, has been a revelation since returning from injury and believes the team's form has added a whole new dimension to the second half of the season.
"We have to keep believing," said the 34-year-old. "There is a long way to go and things have changed around.
"It can only happen if we win our games but if we go on performing like we have done in the last few league games and keep doing that, it's all we can do. We need to keep this form and this attitude."