The Voice UK: Jessie J and Tom Jones duet while Team Will are hit by sickness bug

Jessie J and Tom Jones put their The Voice UK rivalry to one side so they could team up for a duet.

Jessie J and Tom Jones sang a duet on Radio 2 / WENN

The Voice UK coaches Jessie J and Tom Jones sang 'Mockingbird' together for a special live gig as part of BBC Radio 2's 2DAY 2012 event at 100 Club in London yesterday.

It's no wonder Jessie J had a big smile on her face when she posed for pictures with Tom Jones, as she tweeted earlier in the day: "Now off to soundcheck with @RealSirTomJones for #radio2 live!!!! Woooooooo I'm so excited to have the pleasure of singing with such a legend."

[Related article: The Voice addresses Cheryl Cole rumours and denies Jessie J axe]

The Voice UK coaches made a night of it, with Jessie J tweeting that evening: "At dinner with @RealSirTomJones to celebrate our first performance together for Radio 2. Lovely :)"

She also urged her Twitter followers to buy Tom Jones' album: "Calling all #heartbeats please support @RealSirTomJones new album 'Spirit in the room' out NOW :D x its amazing!"

Jessie J wore Boy London for her Tom Jones duet / WENN

Jessie J followed Rihanna's lead by dressing in head-to-toe Boy London, wearing the £55 Boy Eagle sweatshirt and £40 matching leggings for her duet with Tom.

Rihanna covered herself in Boy London for her recent appearance on the Jonathan Ross Show.

It wasn't quite as happy over in Team Will, however, as three of Will.i.am's acts have been ill.

[Related article: Jessie J and The Voice UK coaches should have sex, says Brian Dowling]

Jaz Ellington, Joelle Moses and Frances Wood have caught a violent sickness bug, the Sun reports.

With four acts being axed from the show this weekend, the singers are really worried.

We'll get to see how they cope on The Voice UK on Saturday night. Feel better guys!