The forward has scored 15 league goals this season on-loan with The Seagulls, and joins for good from Bournemouth.
The winger made a cameo appearance in Villa's 1-0 derby defeat to Wolves on Saturday.
A host of Premier League clubs are reportedly showing interest in the English left-back.
The Newcastle striker has notched 17 goals in the English second tier, with less than half the season played.
The Villa man has praised the club's away supporters this season.
Chelsea prospect Isaiah Brown is thriving during his first spell of senior English football and he’s already being tipped for the big time.
Paul Trollope's Cardiff City sit bottom of the Championship but does he have to win to save his job this weekend?
Derby County fans took to Twitter to voice conclusions that the Rams were lucky to leave the iPro Stadium with a draw against Aston Villa
Bristol City FC fans took to Twitter to voice their positive feelings about the sides performance in the 1-0 loss to Newcastle United Saturday.
Queens Park Rangers fans made their feelings clear on Twitter after the club's defeat to Preston North End in the Sky Bet Championship
Tottenham Hotspur boss Jose Mourinho has taken over from Maurizio Pochettino's Father at the North London club.
Rafa Benitez led Everton's bitter rivals Liverpool to Champions League success - but could he make a shock return to the Premier League with The Toffees?
Liverpool had a VAR decision go in their favour on Saturday, but it was the right call.
Everton owner Farhad Moshiri is said to be a fan of Bournemouth boss Eddie Howe.
The German attacker has long been linked with a move to Liverpool.
Rangers have a big few months ahead of them both off and on the pitch as they try to push for silverware under Steven Gerrard.
Tottenham Hotspur continue to pursue Lille's Luis Campos.
Tottenham Hotspur have been linked with Ruben Dias.
Brendan Rodgers loved working with Ajer at Scottish Premiership champions Celtic and a reunion could be on the cards at Premier League Leicester City.
Liverpool and Everton fans are both upset with official appointments for their derby clash next week.