A once-in-a-lifetime honeymoon experience is something that can't be bought in a store.
It was an once-in-a-lifetime experience.
For a day you'll never forget on that special occasion, take a once-in-a-lifetime voyage to the world's waters?
This is truly a once in a lifetime prize that every rock ' n ' roller would sell their soul for.
This can help make a once in a lifetime vacation even better.