Pop star Taylor Swift was given an early birthday treat on Wednesday (11Dec13) when the audience at her show in Australia serenaded her.

The singer turns 24 on Friday (13Dec13) and she will be marking the milestone Down Under as she continues her Australian tour.

She was given a surprise during her show in Perth on Wednesday when the crowd turned the tables on her, and sang a rendition of Happy Birthday.

After the concert, Swift wrote in a post on Twitter.com, "Perth! Insane crowd! When you randomly all started singing happy birthday... Well played."