Celtic are being held to a 1-1 draw with Aberdeen at half time in the Scottish Cup.

Anthony Stokes gave the champions the lead on eight minutes when he brought down Giorgios Samaras's long pass before finishing it off.

Russell Anderson gave the visitors the equaliser on 38 minutes when he hooked home after the ball fell to him in the box from a corner.

Scott Brown had a chance to double the lead shortly before Anderson's goal, but his effort was too high after he drifted inside to shoot.