HAULING ASS, RED-FACED MILEY BUTT-DIALS LIAM!

Miley_stry

MILEY CYRUS and ex-fiance LIAM HEMSWORTH talked for the first time since their bustup – and it was beyond WEIRD!

A family pal reveals Ms. Wrecking Ball and two galpals were about to haul ass on a car trip when she unknowingly butt-dialed – and suddenly Liam’s voice barked on her cell phone: “Hello, Miley?… MILEY?”

Shocked, she saw his name displayed and gasped: “It’s Liam!”

As her grrls giggled, Miley asked her ex: “Why are you calling?”

When Liam responded she’d called him, horrified Miley realized her butt had betrayed her.

“Miley’s usually bold, but she cringed and got all embarrassed,” said the source.

“Stammering and stuttering, she told Liam she’d phoned by mistake – then hung up fast as her girlfriends screamed!”

After a good laugh, Miley confided she’d learned one thing from the call:

Hearing Liam’s voice now had no effect on her at all.