The CW confirmed that Smallville will be back for a ninth season. Since Allison is already signed for next season this means we will be able to enjoy Allison as Chloe for atleast one more year.

THE CW ANNOUNCES EARLY PICKUPS OF SERIES
“Gossip Girl,” “One Tree Hill,” “90210,” “America’s Next Top Model,” “Smallville” and “Supernatural” To Return Next Season

Also renewed were the network’s established Thursday team of SMALLVILLE, in its ninth season, and SUPERNATURAL, which after posting ratings growth this season, will enter its fifth season next year.

Source: Kryptonsite.com