BOSTON (CBS) – Boston Mayor Tom Menino says he may be home before Christmas. The mayor says he should be released on Sunday.

Maestro Keith Lockhart just paid the mayor a visit at Spaulding Rehabilitation Hospital. The two sang a duet of “Winter Wonderland.”

Menino has been at the rehab facility for weeks, recovering from several conditions including blood clots, a spine fracture and newly-diagnosed type 2 diabetes.

Menino’s spokeswoman, Dot Joyce, told The Boston Globe it was not certain the mayor would leave the hospital Sunday.

“It’s a hope, but it’s not clear when he’s being released,” Joyce said.

Menino will celebrate his 70th birthday next week.