Christina Aguilera put her growing baby bump on display  when she went on a shopping trip with fiancé Matt Rutler in Beverly Hills on Saturday. The expecting singer appeared to be in a cheerful mood as she exited a Barneys New York store, and even flashed a "hang loose" sign as she walked with Matt. Back in March, Christina confirmed that she is expecting a baby girl  with Matt, whom she started dating in 2010. The singer already has one son, Max, with ex-husband Jordan Bratman. Christina is currently taking an extended break from The Voice, where she serves as a coach alongside Adam Levine, Blake Shelton, and CeeLo Green. She was absent for the show's most recent season (during which she was replaced by Shakira ) and will see Gwen Stefani  take over her role in the coach chair in the upcoming seventh season. Christina was excited about Gwen joining The Voice team , tweeting back in April that she was "so excited" to welcome the No Doubt singer to her "crazy fam."