THE FAST LANE If it's four wheels and a V-8 that shift your heart into overdrive, check out the 46th annual National Capital Area International Auto Show, the place to see 500 of the 1988 models, from the $4,000 Yugo to the $165,000 Rolls Royce. It's at the D.C. Convention Center, 900 Ninth St. NW (near Metro's Gallery Place or Metro Center stations) 5 to 10:30 Friday, 10 a.m. to 10:30 p.m. Saturday, 10 to 9 Sunday, 11 to 10:30 Monday through Friday and again next weekend. Admission is $6, $2.50 for kids under 12. Call 371-4200 for more information.

ON THE HOME FRONT The halls are decked and the doors are open for:

Frederick's second annual Candlelight House Tour of nine Federal and Victorian homes, 6 to 9:30 Saturday and noon and 4 Sunday. You can buy tickets until 4 Friday ($8) at City Hall (101 North Court St.); after that, they'll be $10 during tour hours. 301/663-8687.

Six homes and the Queen Anne-style Inn of Yesteryear are what you'll see as part of the 4-H Holiday House Tour 1 to 5 Sunday in the Goshen/ Laytonsville area, five miles northeast of Gaithersburg. Tickets, $10, are available at the inn, 23601 Laytonsville Rd. Call 948-6098 on Friday.

Glimpse a Victorian Christmas on the Logan Circle House Tour 1 to 5 Sunday. The tour includes eight houses and includes a bazaar at the Mount Olivet Church, 1308 Vermont Ave. NW. Advance tickets are $8 at the church; at the door it's $10. 667-2244.

THE LATIN BEAT Combining traditional South American music and the strains of the New Song Movement, the Salvadoran quintet Cutumay Camones performs with a cappella group In Process . . . at St. Stephans Church, 16th and Newton NW at 7:30 Saturday. Tickets are $7 at the door. Call 797-9128.

ON THE HOLIDAY HUNT Loudoun County strikes up the band -- or six of them, including the Redskins Band -- for its bicentennial parade in downtown Middleburg at 3 Saturday. While floats, horses, hounds and more promenade through town, an Arts and Crafts Show from 10 and 5 at the Community Center (on the west end of town) will offer quilts, watercolor paintings, baskets, decoys and lots more. Admission is $1. 703/687-6375.

REST OF THE BEST

The Kankouran West African Dance Company performs for kids at 9:30 and 11 Saturday at the Helen Hayes Gallery of the National Theater, 13th and Pennsylvania NW. Free. Call 783-3372 . . . The seventh annual Turkish Bazaar, with carpets, copperware, jewelry and food is 10 to 5 Friday and Saturday at the Turkish Embassy, 1606 23rd St. NW. $1. 293-4670 . . . Baltimore lights up the season with its annual holiday walk 5 to 9:30 Friday with concerts, a "live" Christmas tree and other surprises. Free, beginning at Charles and North Avenue. 301/837-INFO . . . Actress Ellen Burstyn reads poems of D. H. Laurence at 7:30 Sunday at the Hirshhorn Museum Auditorium. It's $8, $5 for students with IDs. 357-3030.

A CAROLING YOU'LL GO

Get out of the shower and over to Wolf Trap's 18th annual Christmas Carol Sing-Along. You'll have lots of company: more than 25 area choirs will be participating, plus Frosty the Snowman and Santa himself. During the closing carol, "Silent Night," the audience will file out in candlelight procession; come prepared with a candle and bells to ring forth the season. It's free at 4 Sunday, but singers are asked to bring canned food for needy children. 255-1902.

Also on the sing-along front, the George Washington University Singers invite singers to take part in their fall concert and Messiah Sing-Along at 8 Friday at the Marvin Center, 800 21st St. NW. Free. Call 994-6245.

HOLIDAY JAMS

Lose your blues at Blue Christmas, a concert to benefit the homeless and Community for Creative Non-Violence. With emcee Jerry "The Bama" Washington and poet Griot Otis Williams, musicians include John and James Jackson, Archie Edwards, Flora Molton, John Cephas, Phil Wiggins, Bill Harris, the Ducktones and Saffire: The Uppity Blues Women. It's at 8 Friday; tickets are $10 at the door at Gaston Hall, Georgetown University, 37th and O NW. 369-6781.

THE SCOTTISH WALK AND MORE IN ALEXANDRIA

Take the high road, take the low road, take the GW Parkway to Alexandria's 17th annual Scottish Christmas Walk 10 to 4 Friday and Saturday. The parade begins at 10 Saturday at Wilkes and South Washington streets when the tartan-clad make their way to Market Square, where there'll be a pipeband concert. Also on Saturday, there'll be impromptu bagpipe concerts after the parade and two seatings at Lyles Crouch Elementary School, 530 South St. Asaph St., for a children's lunch with Santa between 11:30 and 2 ($5, call 549-0111 for reservations). The hub of activities is the Alexandria Community Y, 418 South Washington St., where visitors can get a cup of hot cider, peruse tables of antiques, holiday greens and foods and purchase tickets ($15) for the Old Town house tour. Take Metro's Yellow Line to King Street; Dash buses will take you the rest of the way. Call 838-4200 or 838-5005 for more information.

JEWISH JOY

The 10th annual Jewish Folk Arts Festival is 3:30 to 9:30 Sunday at Blair High School, Wayne Avenue and Dale Drive in Silver Spring. Besides holiday craftmaking and music workshops, there'll be performances by the Fabrangen Fiddlers, the Di Shpilers Yiddish Community Theater and Old World Folk Band. Crafts and hot kosher foods will also be for sale. It's $6, $3 for kids under 12, seniors and students. 230-1369.

A LITTLE CULTURE

Young audiences can enjoy the made for kids opera "Who Am I?" about a young princess and a handmaiden who trade places. It's at 3 and 5 Saturday at the Thomas Jefferson Theater at 125 South Old Glebe Rd. (near the intersection of Glebe and Arlington Boulevard) in Arlington; tickets are $5 for children, students and seniors; $6 for grown-ups. Call 739-2918.