Frequent tour mates ZZ Top and Jeff Beck shared the stage last Wednesday in London for an impressive four-song encore at the SSE Arena. Beck was celebrating his 71st birthday, but showed he hasn't lost his "fastball" when he sat-in with ZZ Top.

Beck emerged at the start of the encore on June 24 and was presented with a birthday cake. He then teamed with ZZ Top on "Rough Boy," "Sixteen Tons," "La Grange" and "Tush." Stellar fan-shot video of the guest spots has been shared thanks to Andi Picker:

[Rough Boy]

[Sixteen Tons]

[La Grange]

[Tush]