You know how to whistle, don't you? You just put your lips together ... and blow.

The w0histle has made a resounding return to pop radio in recent years, providing the irresistibly catchy hook for dozens of smashes, including Hilary Duff's sparkly Breathe In. Breathe Out. tune, "Sparks."

And to help illustrate that point, the Younger superstar has put together a fun little mega-mix of all things whistle, which we're happy to premiere right here today on PopCrush.

Kicking off with a brief snippet of Hollywood icon Lauren Bacall's classic line from 1944's To Have and Have Not, the throbbing mash-up weaves several whistlin' jams of recent memory together with Hil's own tune, including Maroon 5's "Moves Like Jagger," Flo Rida's "Whistle," Foster The People's "Pumped Up Kicks" and Britney Spears' "I Wanna Go." That "I-I-I wanna go all the way-y-y!" breakdown is definitely the best part — it's almost like getting a duet! (One day ... let us pray.)

Ready to whistle right through to the weekend with Hilary and company? Check out the mash-up up top — and then swing your arms to the original version of her latest whistlin' hit below.

Hilary Duff + More Pop Stars Working It Out