Lady Gaga reveals Britney love with Spears thermos

Lady Gaga has shown love for fellow pop princess Britney Spears by revealing she takes a Spears-branded cup with her on tour.

Sharing an image of the thermos on Twitter, Gaga promised fans - and Britney herself - that she would take the merchandise to every date on her upcoming 'Born This Way' ball.

"Real fans never turn their back on you #WillAlwaysLoveBritney Some stars really are as sweet as you thought they were," Gaga tweeted as she shared the picture.

Britney Spears replied to Gaga, saying: "Wonder what @LadyGaga keeps in that thermos??? Cant WAIT to see you on tour. MISS YOU !!!"

Lady Gaga recently caused controversy when she suggested she was starving herself ahead of her tour, but later revealed she was simply on a special diet, eating five small meals a day - all washed down with Britney juice, no doubt.