The rapper was performing at the O2 Arena and Rihanna went along for a look - taking the Tube to get there.

She is said to have travelled from Waterloo to North Greenwich alongside her entourage.

It's not the first time the global star has taken the Tube around London, with the singer hopping on and off when she performed a residency at the O2 Arena last year.

As previously reported, Rihanna will be returning to the UK in the summer to peform at Radio 1's Hackney Weekend alongside a host of top music talent.

She is also planning a collaboration with Katy Perry - suggesting that the blockbluster will happen at some point in the future.