The Firework singer seemed in great spirits as she flaunted her ample cleavage in a seriously busty jumpsuit at the iHeartRadio Music Awards.

Appearing to have put the break-up from the Hollywood actor behind her, Katy put her best fashion foot forward as she shimmered in the gold get-up.

The off-shoulder number showed off her incredible figure and drew more attention to her décolletage.

Katy, 32, looked stunning as she debuted her new cropped blonde hairdo’ on the night.

She accentuated her natural beauty with a smoky eye and ɴuᴅᴇ lips and finished the look with a pair of dangle diamond earrings.

Later in the evening, she put on a show-stopping performance as she sang her new single Chained To The Rhythm.

Wearing a boob-baring red bodice, the pop star flashed even more cleavage in the snazzy ensemble.

Last week, it was announced Katy and Orlando had gone their separate ways after a year-long romance.

The pair – who first reportedly got together at a Golden Globes afterparty in January last year – decided to take “respectful and loving space”.

“Before rumours or falsifications get out of hand we can confirm that Orlando and Katy are taking respectful, loving space at this time,” their representatives told US Weekly in a statement.

The couple’s decision to end their romance comes after the A-List pair enjoyed a night out at the Oscars Vanity Fair afterparty just a few days before.

The Roar singer and the 40-year-old actor posed for many pH๏τos during the bash although they didn’t walk the red carpet together.