Every Tuesday, we dedicate this segment to the songs that bring you right back to a very specific time in your life - first love, exams, moving out from home, backpacking around the world, nights out, nights in, going to college, bad jobs, falling in love, falling out of love, weddings and babies.
For coming on the show and sharing your Milestone Music Moment, we'll send you a lovely memento of your story. You will receive all the elements of the tale - the date, lyrics of the song and more, all on a beautifully finished poster for you to treasure.
On this morning's show, Denis Kelleher from Co.Kerry, told us his amazing story from Australia in 2008.
He headed off on adventure with his then girlfriend Carol, but little did she know that he a very important question to ask her along the way.
His plans were scuppered a little bit, but he finally got the chance to make it a trip they would never forget.
Their Milestone song is 'Down Under' by Men at Work, as it always reminds them of the tour of Oz.
You can listen to the story in full by clicking play in the image above the headline.
If you've a milestone of your own, we'd love to hear all about it. Email your story to firstname.lastname@example.org