Singer Ingrid Andress says she was drunk during baseball anthem performance

Ingrid Andress performs on day four of the Lollapalooza Music Festival (Amy Harris/Invision/AP)

After a widely criticised performance of the US national anthem at the MLB Home Run Derby, country singer Ingrid Andress has apologised and said she was drunk.

“I’m checking myself into a facility today to get the help I need,” she wrote in an Instagram post.