I was in waterloo station on August 20th, ending my europe summer trip, when i heard a song at the Buger King. I had heard the song in barcelona and germany as well but i have no idea who sings it. its dance/pop with a female singer. the only lyrics i remember are:

"your dreams will show you the way
come and take your fears away
yeah yeah yeah
la la la la la la la
it went up and down"

Thanks for any help