The singer was helping celebrate a special birthday.
Peter Andre has been at Leeds-Bradford Airport today to help Jet2.com is today celebrate 15 years since its first day of flying.
The airport was the airline's first ever base and they have since carried more than 65 million customers.
The celebrity guest surprised customers at check-in and even boarded the aircraft to serenade customers and staff with a special 'Happy Birthday' rendition.
From Leeds Bradford Airport alone, Jet2.com has carried over 23 million customers since 2003. Its growth has seen the company grow the number of employees in Yorkshire from 80 to over 2,000, and means it will operate a fleet of 15 aircraft at the airport this summer.
Steve Lee, Commercial Director of Jet2.com and Jet2holidays, who was on the company's first ever flight back in 2003 said: "Today marks 15 years of Jet2.com and is a great chance to look back on what has been achieved since we launched. The things that mattered to customers 15 years ago, such as VIP customer service, great flight times and value, are just as important today and that is what we have focused on resolutely for the past decade and a half.
"Our family friendly formula means we have expanded to become the third largest airline, whilst winning a string of accolades at the same time. As we look forward to the next 15 years and beyond, our commitment to those same values remains at the heart of everything we do."