Kelly Clarkson and her ex-husband, Brandon Blackstock, settled their divorce in 2022 — but that didn’t bring the legal drama between them to an end. Clarkson has filed a new lawsuit against Blackstock, seeking to recoup years’ worth of fees that she says he collected inappropriately. Billboard reports that Clarkson filed suit against Blackstock on Monday (March 11), asking a Los Angeles court to find that Blackstock and the firm run by his father — Clarkson’s former father-in-law, heavy-duty Nashville talent manager Narvel Blackstock of Starstruck Entertainment — had violated labor laws all th…