The TOWIE star was quick to respond to one Twitter user yesterday, who commented: "What have you done to your lips!!! @Megan_Mckenna_."
Megan replied: "Lip fillers like I've ALWAYS HAD SINCE DAY 1 on tv. Jeeeezzzzz people need to get a life."
When the Twitter user responded: "Lol seriously love!! I know what you've had done babe but looks ridiculous especially your top lip."
So Megan, 23, replied: "Firstly, don't babe me, u don't no me. Secondly, at least I have a top lip. Bubye (sic)."
Former Celebrity Big Brother housemate Megan's been open about having lip fillers, even posting on Snapchat earlier this year that her mum had advised her to lay off them. "What has my life come to?" she told fans, joking: "I've had so many lip fillers I can't talk properly."
Megan's just back in the UK following a trip to Dubai to shoot the campaign for her new MissPap.co.uk collection, which is available now. It was her second trip to Dubai in as many weeks as she also holidayed in the celebrity hotspot with boyfriend Pete Wicks earlier this month.