The striker scored twice in a 4-2 win on Boxing Day 2012.
The Tottenham forward has netted the same amount of goals as Wayne Rooney, Radamel Falcao and Robin van Persie combined this season.
The former Liverpool star has been discussing past Reds teams - as well as those of the Magpies and Leeds.
The Swiss forward, who was considered by the Gunners in the summer, scored twice at the BayArena last night.
The Villa boss insists the former England midfielder is not "broken" has still has a role to fill at the club, both on and off the pitch.
To be played on Saturday 14th March 2015 at 12:45. Venue: Selhurst Park, London
Tottenham Hotspur’s Nacer Chadli and Manchester United’s Juan Mata compare…
Arsenal and West Ham United will face each other at the Emirates Stadium in the Premier League today.
To be played on Saturday 14th March 2015 at 15:00. Venue: The Hawthorns, West Bromwich
The under-18’s star has penned a new deal to keep him at his boyhood club.