Hammill, who had a spell on loan from Liverpool at Bloomfield Road in the 2008-09 season, has scored eight goals for the Tykes so far this term and his impressive performances in the npower Championship have led to him being linked with a host of clubs.
"There are lots of people who would be interested in Adam Hammill," Holloway said. "His agent has done a good job and there is a clause in his contract which guarantees you can get him. We're not the only ones who know that, but we like the boy and we've had him on loan here."
He added: "But he's not my player and there are a lot of things that have got to happen before he is.
"There are a lot of other clubs who want him, so the boy is in a great situation."
Meanwhile, Holloway has once again emphasised that he views a bid of £3.5million for Seasiders captain Charlie Adam - reportedly made by Aston Villa - to be derisory.
"I don't believe it is right for him to move at the moment," Holloway said.
"The offers we are getting and the clubs that are asking about him, I believe he is better than that, with the greatest respect to them.
"£3.5million for him? You're taking the mickey out of us, it is an absolutely disgraceful offer.
"Why is it in the paper and why are they talking about it when they are below us?"