NEW YORK (AP) — In the midst of a career surge that has made him one of rap’s biggest stars, Lil Wayne is bracing for a year behind bars after pleading guilty Thursday in a 2-year-old gun case.A glum Lil Wayne said little as he admitted illegally having a loaded gun on his tour bus in 2007, moving to end a case that churned along as he collected Grammys and gold records. He’s expected to get a year in jail at his February sentencing.The plea, which came as he boasted the country’s No. 1 pop song, makes Lil Wayne the latest in a long line of rappers to face incarceration after topping the charts.