Shakira talks Levine’s ‘revenge’

Shakira says Blake Shelton can expect imminent "revenge" from Adam Levine.

The musicians are all panellists on TV singing competition The Voice US.

On Monday Blake shared Adam's phone number with millions of fans via Twitter, and Shakira expects the Maroon 5 singer is already planning a counterattack.

"[Blake] better expect some revenge from Adam! It's going to get ugly!" she laughed to E! News.

Shakira also confirmed she "would never" give her phone number to Blake following his prank on Adam.

Usher is also a The Voice US panellist and he is horrified by the prospect of being the victim of the country star's antics.

"I'm not playing with Blake," he laughed. "He better not give my f***ing number away. I'm not playing."

Before yesterday's The Voice performance show aired, Blake took to Twitter teasing Adam about the impending gag.

"@adamlevine… I just found the craziest thing in my phone!!! Your PERSONAL cell phone number… hope I'm not stupid enough to tweet it out…" he wrote to millions of followers.

Adam quickly responded saying he was "amazed" by Blake's "stupidity".

But the Maroon 5 star's statements didn't deter his co-star from following through with the prank.

"HEY EVERYONE!!! Here it is: [phone number] @adamlevine's CELL NUMBER! Think I'm kidding?" Blake tweeted. "Try calling it!! B***h!!!"

The Voice US family is expanding, as No Doubt's Gwen Stefani has reportedly joined the panel as a coach for the next season.

Christina Aguilera, who has been with the show for years, welcomed Gwen on Monday with open arms.

"So excited to have you join #TheVoice squad @GwenStefani! Welcome to our crazy fam! Kisses- xoxo #blondesdoitbest," Christina wrote on her Twitter account.