Singh became especially well known for hosting the local Public Broadcasting Service (PBS) public television station WTTW's restaurant review show "Check, Please!" and her regular appearances on "Chicago Tonight" for the "Ask Alpana" segment on Thursday evenings. She replaced the original host of "Check, Please!", Amanda Puck, in October 2003 and remained in that role until 2013, when she was replaced by Catherine De Orio. In 2018, however, Singh was reported to be returning to the show, signing a two-year contract.