“Hunger Games” star Alexander Ludwig, who’s in town filming “Grown Ups 2,” was at Strega Waterfront on Sunday, one night after Doc Rivers, Rajon Rondo, and Jeff Greene celebrated the Celtics’ victory there. Renee Fecarotta Russo, who will be on “Mob Wives: Chicago,” was also at Strega on Sunday night. . . . Aerosmith’s Steven Tyler was seen lunching with singer Lana Del Rey at Pink Taco in West Hollywood on Sunday. That means he missed some great weekend weather at home on Lake Sunapee, N.H. . . . Retired Rear Admiral Susan Blumenthal , medical device innovator Robert Ward, and Secretary of the Interior Ken Salazar received honorary degrees from UMass-Lowell over the weekend. Supporters who joined them at commencement included Blumenthal’s husband US Representatives Edward Markey and Niki Tsongas.