A 15-year-old girl who performed at President Obama's inauguration last week was shot dead Tuesday while hanging out with friends in bullet-scarred Chicago.

Hadiya Pendleton -- described by a relative as a “walking angel” -- was standing under a canopy in Vivian Gordon Harsh Park when a gunman ran down an alley, opened fire at the group and fled in a white car, police said.

Pendleton was shot in the back but managed to run about a block before she collapsed, officer Laura Kubiak said. She died at the hospital.

A 16-year-old boy was wounded in the 2:20 p.m. incident. Police said Pendleton, who had no criminal record, was probably not the intended target.

“As usual, the bad guy aims, but he never hits the other bad guy . . . He hits the one that hurts {has} the most to lose,”